Head-to-head comparison
DeepSeek-V4-Flash vs. MiMo-V2.5-Pro
Compare published benchmark results from matching versions and cohorts, API pricing, and technical specifications. Any documented test setup differences remain visible.
- shared result series
- 58
- distinct benchmarks
- 1
- latest retrieval
- 2026-09-04
Change model selection
Specifications
General specifications
Release date, availability, context window, architecture, and published parameter counts at a glance. Undisclosed details remain marked as unavailable.
| Attribute | DeepSeek-V4-Flash | MiMo-V2.5-Pro |
|---|---|---|
| Provider | DeepSeek | Xiaomi |
| Released | Apr 24, 2026 | Apr 23, 2026 |
| Availability | Preview | Open Source |
| Model type | Open Weights | Open Weights |
| Parameters | 284B, 13B active | 1T, 42B active |
| Architecture | Mixture of Experts | Mixture of Experts |
| Context window | 1,000,000 tokens | 1,000,000 tokens |
| Knowledge cutoff | Not published | Not published |
| Technical sources | Model | Model |
Pricing
API pricing compared
The table compares official standard API rates per 1M tokens, including published cache pricing. Batch, fast, priority, regional surcharges, tool calls, and cloud platform pricing are excluded.
| Price type | DeepSeek-V4-Flash | MiMo-V2.5-Pro |
|---|---|---|
| API input | $0.14 | $0.43 |
| API output | $0.28 | $0.87 |
| Cache read | $0. | $0. |
| Cache write (5 min.) | Not listed | Not listed |
| Cache write (1 hr.) | Not listed | Not listed |
| Price verified | 07/30/2026 Source | 07/31/2026 Source |
DeepSeek-V4-FlashMiMo-V2.5-Pro
API inputUSD per 1M tokens, base tier
DeepSeek-V4-FlashLower price$0.14
MiMo-V2.5-Pro$0.435
API outputUSD per 1M tokens, base tier
DeepSeek-V4-FlashLower price$0.28
MiMo-V2.5-Pro$0.87
Cache readUSD per 1M tokens, base tier
DeepSeek-V4-FlashLower price$0.003
MiMo-V2.5-Pro$0.004
Key to the marks:better valuebetter, but not conclusivetie
Pricing by provider
Direct developer pricing and provider endpoint tariffs routed through OpenRouter are listed separately. Prices are in USD per 1M tokens. Context-dependent direct tiers plus regional, Flex, Priority, and other OpenRouter tariffs remain individually identifiable.
| Model | Provider | Purchase route and tariff | Input per 1M tokens | Output per 1M tokens | Source |
|---|---|---|---|---|---|
| DeepSeek-V4-Flash | DeepSeek | Direct from developerStandard API | $0.14 | $0.28 | Source07/30/2026 |
| Alibaba | Via OpenRouteralibaba | $0.352 | $1.056 | Source09/07/2026 | |
| AtlasCloud | Via OpenRouteratlas-cloud/fp4 | $0.44 | $1.32 | Source09/07/2026 | |
| Baidu | Via OpenRouterbaidu/fp8 | $0.14 | $0.28 | Source09/07/2026 | |
| BaseTen | Via OpenRouterbaseten/fp8#1 | $0.13 | $0.26 | Source09/07/2026 | |
| BaseTen | Via OpenRouterbaseten/fp8#2 | $0.13 | $0.26 | Source09/07/2026 | |
| Cloudflare | Via OpenRoutercloudflare | $0.44 | $1.32 | Source09/07/2026 | |
| CoreWeave | Via OpenRoutercoreweave/fp8 | $0.13 | $0.28 | Source09/07/2026 | |
| DeepInfra | Via OpenRouterdeepinfra/fp8 | $0.06 | $0.18 | Source09/07/2026 | |
| DeepSeek | Via OpenRouterdeepseek | $0.22 | $0.66 | Source09/07/2026 | |
| DigitalOcean | Via OpenRouterdigitalocean | $0.08 | $0.252 | Source09/07/2026 | |
| Fireworks | Via OpenRouterfireworks | $0.22 | $0.66 | Source09/07/2026 | |
| GMICloud | Via OpenRoutergmicloud/fp8 | $0.352 | $1.056 | Source09/07/2026 | |
| Inceptron | Via OpenRouterinceptron/fp4 | $0.13 | $0.28 | Source09/07/2026 | |
| Makora | Via OpenRoutermakora | $0.09 | $0.195 | Source09/07/2026 | |
| Mancer 2 | Via OpenRoutermancer/fp8 | $0.15 | $0.5 | Source09/07/2026 | |
| Morph | Via OpenRoutermorph/bf16 | $0.1234 | $0.3475 | Source09/07/2026 | |
| NextBit | Via OpenRouternextbit/fp8 | $0.4 | $1.2 | Source09/07/2026 | |
| Novita | Via OpenRouternovita/fp8 | $0.4092 | $1.2276 | Source09/07/2026 | |
| OpenInference | Via OpenRouteropen-inference/fp8 | $0.05 | $0.16 | Source09/07/2026 | |
| Parasail | Via OpenRouterparasail/fp8 | $0.14 | $0.28 | Source09/07/2026 | |
| Phala | Via OpenRouterphala | $0.44 | $1.32 | Source09/07/2026 | |
| Reka | Via OpenRouterreka/fp4 | $0.11 | $0.66 | Source09/07/2026 | |
| Relace | Via OpenRouterrelace/fp4 | Lowest listed price: $0.045 | Lowest listed price: $0.09 | Source09/07/2026 | |
| Sail Research | Via OpenRoutersail-research/fp4 | $0.065 | $0.18 | Source09/07/2026 | |
| SiliconFlow | Via OpenRoutersiliconflow/fp8 | $0.22 | $0.66 | Source09/07/2026 | |
| StreamLake | Via OpenRouterstreamlake/fp8 | $0.088 | $0.264 | Source09/07/2026 | |
| Together | Via OpenRoutertogether | $0.14 | $0.28 | Source09/07/2026 | |
| Venice | Via OpenRoutervenice | $0.175 | $0.35 | Source09/07/2026 | |
| Wafer | Via OpenRouterwafer/fast | $0.1 | $0.25 | Source09/07/2026 | |
| MiMo-V2.5-Pro | Xiaomi | Direct from developerStandard API | $0.435 | $0.87 | Source07/31/2026 |
| AtlasCloud | Via OpenRouteratlas-cloud/fp8 | $0.435 | $0.87 | Source09/07/2026 | |
| DeepInfra | Via OpenRouterdeepinfra/fp8 | $0.39 | $1.17 | Source09/07/2026 | |
| DigitalOcean | Via OpenRouterdigitalocean | $0.4 | $1.5 | Source09/07/2026 | |
| GMICloud | Via OpenRoutergmicloud/bf16 | Lowest listed price: $0.3045 | Lowest listed price: $0.609 | Source09/07/2026 | |
| Novita | Via OpenRouternovita | $0.4802 | $0.9605 | Source09/07/2026 | |
| StreamLake | Via OpenRouterstreamlake | $0.522 | $1.044 | Source09/07/2026 | |
| Xiaomi | Via OpenRouterxiaomi/fp8 | $0.435 | $0.87 | Source09/07/2026 |
Performance
Shared benchmarks
Only published results with the same benchmark version, task, metric, and comparison cohort are paired. Different reasoning levels, agents, harnesses, or output limits appear directly in the table.
Capability profile from matched benchmarks
Each axis averages directly matched benchmark families. A value of 100 means the stronger value within this pair, not a universal quality score.
DeepSeek-V4-Flash
MiMo-V2.5-Pro
Coding: 97.6 / 100 (1 benchmark family)
Reasoning: 97.3 / 100 (1 benchmark family)
Mathematics: 96.3 / 100 (1 benchmark family)
Knowledge: 97.4 / 100 (1 benchmark family)
Finance: 97.7 / 100 (1 benchmark family)
Legal: 98.2 / 100 (1 benchmark family)
Health: 98.1 / 100 (1 benchmark family)
General: 97.7 / 100 (1 benchmark family)
29 matched rows from 1 benchmark families were considered. The radar shows 8 of 8 comparable categories.
DeepSeek-V4-FlashMiMo-V2.5-Pro
LMArena Text, Style ControlOverall. Higher is better. No documented setup difference
DeepSeek-V4-Flash1,435.816
MiMo-V2.5-ProWinner1,468.271
LMArena Text, Style ControlOverall. Higher is better. Test setup not documented as identical
DeepSeek-V4-Flash1,438.462
MiMo-V2.5-ProHigher measured value1,468.271
LMArena Text, Style ControlBusiness, management and finance. Higher is better. No documented setup difference
DeepSeek-V4-Flash1,437.854
MiMo-V2.5-ProWinner1,471.792
LMArena Text, Style ControlBusiness, management and finance. Higher is better. Test setup not documented as identical
DeepSeek-V4-Flash1,434.968
MiMo-V2.5-ProHigher measured value1,471.792
LMArena Text, Style ControlChinese. Higher is better. No documented setup difference
DeepSeek-V4-Flash1,472.677
MiMo-V2.5-ProWinner1,511.885
LMArena Text, Style ControlChinese. Higher is better. Test setup not documented as identical
DeepSeek-V4-Flash1,479.62
MiMo-V2.5-ProHigher measured value1,511.885
LMArena Text, Style ControlCoding. Higher is better. No documented setup difference
DeepSeek-V4-Flash1,483.101
MiMo-V2.5-ProWinner1,520.349
LMArena Text, Style ControlCoding. Higher is better. Test setup not documented as identical
DeepSeek-V4-Flash1,479.449
MiMo-V2.5-ProHigher measured value1,520.349
LMArena Text, Style ControlCreative writing. Higher is better. No documented setup difference
DeepSeek-V4-Flash1,408.18
MiMo-V2.5-ProWinner1,435.028
LMArena Text, Style ControlCreative writing. Higher is better. Test setup not documented as identical
DeepSeek-V4-Flash1,408.903
MiMo-V2.5-ProHigher measured value1,435.028
LMArena Text, Style ControlEnglish. Higher is better. No documented setup difference
DeepSeek-V4-Flash1,445.287
MiMo-V2.5-ProWinner1,481.475
LMArena Text, Style ControlEnglish. Higher is better. Test setup not documented as identical
DeepSeek-V4-Flash1,449.894
MiMo-V2.5-ProHigher measured value1,481.475
Key to the marks:better valuebetter, but not conclusivetie
| Benchmark and task | DeepSeek-V4-Flash | MiMo-V2.5-Pro | Source |
|---|---|---|---|
LMArena Text, Style ControlOverallTest detailsNo documented difference in the test setupVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterDeepSeek-V4-Flash: Snapshot: deepseek-v4-flash, Harness: Arena text, style control MiMo-V2.5-Pro: Snapshot: mimo-v2.5-pro, Harness: Arena text, style controlDeepSeek-V4-Flash: Style-controlled Arena rating from 48,963 anonymous pairwise votes.MiMo-V2.5-Pro: Style-controlled Arena rating from 57,416 anonymous pairwise votes. | 1,435.816 95% confidence interval: ±4.15The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | Winner1,468.271 95% confidence interval: ±3.92The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | LMArenaSource detailsData as of: 09/01/2026 |
LMArena Text, Style ControlOverallTest detailsTest setup not documented as identicalNo direct winnerVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterDeepSeek-V4-Flash: Snapshot: deepseek-v4-flash-high-preview, Reasoning: high, Harness: Arena text, style control MiMo-V2.5-Pro: Snapshot: mimo-v2.5-pro, Harness: Arena text, style controlDeepSeek-V4-Flash: Style-controlled Arena rating from 48,705 anonymous pairwise votes.MiMo-V2.5-Pro: Style-controlled Arena rating from 57,416 anonymous pairwise votes. | 1,438.462 95% confidence interval: ±4.21The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | Higher measured value1,468.271 95% confidence interval: ±3.92The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | LMArenaSource detailsData as of: 09/01/2026 |
LMArena Text, Style ControlBusiness, management and financeTest detailsNo documented difference in the test setupVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterDeepSeek-V4-Flash: Snapshot: deepseek-v4-flash, Harness: Arena text, style control MiMo-V2.5-Pro: Snapshot: mimo-v2.5-pro, Harness: Arena text, style controlDeepSeek-V4-Flash: Style-controlled Arena rating from 9,911 anonymous pairwise votes.MiMo-V2.5-Pro: Style-controlled Arena rating from 11,336 anonymous pairwise votes. | 1,437.854 95% confidence interval: ±7.128The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | Winner1,471.792 95% confidence interval: ±6.73The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | LMArenaSource detailsData as of: 09/01/2026 |
LMArena Text, Style ControlBusiness, management and financeTest detailsTest setup not documented as identicalNo direct winnerVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterDeepSeek-V4-Flash: Snapshot: deepseek-v4-flash-high-preview, Reasoning: high, Harness: Arena text, style control MiMo-V2.5-Pro: Snapshot: mimo-v2.5-pro, Harness: Arena text, style controlDeepSeek-V4-Flash: Style-controlled Arena rating from 10,060 anonymous pairwise votes.MiMo-V2.5-Pro: Style-controlled Arena rating from 11,336 anonymous pairwise votes. | 1,434.968 95% confidence interval: ±7.142The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | Higher measured value1,471.792 95% confidence interval: ±6.73The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | LMArenaSource detailsData as of: 09/01/2026 |
LMArena Text, Style ControlChineseTest detailsNo documented difference in the test setupVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterDeepSeek-V4-Flash: Snapshot: deepseek-v4-flash, Harness: Arena text, style control MiMo-V2.5-Pro: Snapshot: mimo-v2.5-pro, Harness: Arena text, style controlDeepSeek-V4-Flash: Style-controlled Arena rating from 2,530 anonymous pairwise votes.MiMo-V2.5-Pro: Style-controlled Arena rating from 3,151 anonymous pairwise votes. | 1,472.677 95% confidence interval: ±12.483The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | Winner1,511.885 95% confidence interval: ±11.287The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | LMArenaSource detailsData as of: 09/01/2026 |
LMArena Text, Style ControlChineseTest detailsTest setup not documented as identicalNo direct winnerVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterDeepSeek-V4-Flash: Snapshot: deepseek-v4-flash-high-preview, Reasoning: high, Harness: Arena text, style control MiMo-V2.5-Pro: Snapshot: mimo-v2.5-pro, Harness: Arena text, style controlDeepSeek-V4-Flash: Style-controlled Arena rating from 2,509 anonymous pairwise votes.MiMo-V2.5-Pro: Style-controlled Arena rating from 3,151 anonymous pairwise votes. | 1,479.62 95% confidence interval: ±12.459The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | Higher measured value1,511.885 95% confidence interval: ±11.287The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | LMArenaSource detailsData as of: 09/01/2026 |
LMArena Text, Style ControlCodingTest detailsNo documented difference in the test setupVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterDeepSeek-V4-Flash: Snapshot: deepseek-v4-flash, Harness: Arena text, style control MiMo-V2.5-Pro: Snapshot: mimo-v2.5-pro, Harness: Arena text, style controlDeepSeek-V4-Flash: Style-controlled Arena rating from 14,346 anonymous pairwise votes.MiMo-V2.5-Pro: Style-controlled Arena rating from 15,755 anonymous pairwise votes. | 1,483.101 95% confidence interval: ±6.376The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | Winner1,520.349 95% confidence interval: ±6.131The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | LMArenaSource detailsData as of: 09/01/2026 |
LMArena Text, Style ControlCodingTest detailsTest setup not documented as identicalNo direct winnerVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterDeepSeek-V4-Flash: Snapshot: deepseek-v4-flash-high-preview, Reasoning: high, Harness: Arena text, style control MiMo-V2.5-Pro: Snapshot: mimo-v2.5-pro, Harness: Arena text, style controlDeepSeek-V4-Flash: Style-controlled Arena rating from 14,310 anonymous pairwise votes.MiMo-V2.5-Pro: Style-controlled Arena rating from 15,755 anonymous pairwise votes. | 1,479.449 95% confidence interval: ±6.409The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | Higher measured value1,520.349 95% confidence interval: ±6.131The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | LMArenaSource detailsData as of: 09/01/2026 |
LMArena Text, Style ControlCreative writingTest detailsNo documented difference in the test setupVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterDeepSeek-V4-Flash: Snapshot: deepseek-v4-flash, Harness: Arena text, style control MiMo-V2.5-Pro: Snapshot: mimo-v2.5-pro, Harness: Arena text, style controlDeepSeek-V4-Flash: Style-controlled Arena rating from 7,972 anonymous pairwise votes.MiMo-V2.5-Pro: Style-controlled Arena rating from 10,262 anonymous pairwise votes. | 1,408.18 95% confidence interval: ±7.747The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | Winner1,435.028 95% confidence interval: ±7.065The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | LMArenaSource detailsData as of: 09/01/2026 |
LMArena Text, Style ControlCreative writingTest detailsTest setup not documented as identicalNo direct winnerVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterDeepSeek-V4-Flash: Snapshot: deepseek-v4-flash-high-preview, Reasoning: high, Harness: Arena text, style control MiMo-V2.5-Pro: Snapshot: mimo-v2.5-pro, Harness: Arena text, style controlDeepSeek-V4-Flash: Style-controlled Arena rating from 8,029 anonymous pairwise votes.MiMo-V2.5-Pro: Style-controlled Arena rating from 10,262 anonymous pairwise votes. | 1,408.903 95% confidence interval: ±7.781The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | Higher measured value1,435.028 95% confidence interval: ±7.065The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | LMArenaSource detailsData as of: 09/01/2026 |
LMArena Text, Style ControlEnglishTest detailsNo documented difference in the test setupVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterDeepSeek-V4-Flash: Snapshot: deepseek-v4-flash, Harness: Arena text, style control MiMo-V2.5-Pro: Snapshot: mimo-v2.5-pro, Harness: Arena text, style controlDeepSeek-V4-Flash: Style-controlled Arena rating from 21,931 anonymous pairwise votes.MiMo-V2.5-Pro: Style-controlled Arena rating from 24,800 anonymous pairwise votes. | 1,445.287 95% confidence interval: ±5.383The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | Winner1,481.475 95% confidence interval: ±5.077The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | LMArenaSource detailsData as of: 09/01/2026 |
LMArena Text, Style ControlEnglishTest detailsTest setup not documented as identicalNo direct winnerVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterDeepSeek-V4-Flash: Snapshot: deepseek-v4-flash-high-preview, Reasoning: high, Harness: Arena text, style control MiMo-V2.5-Pro: Snapshot: mimo-v2.5-pro, Harness: Arena text, style controlDeepSeek-V4-Flash: Style-controlled Arena rating from 21,747 anonymous pairwise votes.MiMo-V2.5-Pro: Style-controlled Arena rating from 24,800 anonymous pairwise votes. | 1,449.894 95% confidence interval: ±5.421The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | Higher measured value1,481.475 95% confidence interval: ±5.077The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | LMArenaSource detailsData as of: 09/01/2026 |
LMArena Text, Style ControlEntertainment, sports and mediaTest detailsNo documented difference in the test setupVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterDeepSeek-V4-Flash: Snapshot: deepseek-v4-flash, Harness: Arena text, style control MiMo-V2.5-Pro: Snapshot: mimo-v2.5-pro, Harness: Arena text, style controlDeepSeek-V4-Flash: Style-controlled Arena rating from 10,423 anonymous pairwise votes.MiMo-V2.5-Pro: Style-controlled Arena rating from 12,963 anonymous pairwise votes. | 1,405.349 95% confidence interval: ±7.122The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | Winner1,439.755 95% confidence interval: ±6.517The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | LMArenaSource detailsData as of: 09/01/2026 |
LMArena Text, Style ControlEntertainment, sports and mediaTest detailsTest setup not documented as identicalNo direct winnerVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterDeepSeek-V4-Flash: Snapshot: deepseek-v4-flash-high-preview, Reasoning: high, Harness: Arena text, style control MiMo-V2.5-Pro: Snapshot: mimo-v2.5-pro, Harness: Arena text, style controlDeepSeek-V4-Flash: Style-controlled Arena rating from 10,655 anonymous pairwise votes.MiMo-V2.5-Pro: Style-controlled Arena rating from 12,963 anonymous pairwise votes. | 1,406.152 95% confidence interval: ±7.06The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | Higher measured value1,439.755 95% confidence interval: ±6.517The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | LMArenaSource detailsData as of: 09/01/2026 |
LMArena Text, Style ControlExcluding tiesTest detailsNo documented difference in the test setupVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterDeepSeek-V4-Flash: Snapshot: deepseek-v4-flash, Harness: Arena text, style control MiMo-V2.5-Pro: Snapshot: mimo-v2.5-pro, Harness: Arena text, style controlDeepSeek-V4-Flash: Style-controlled Arena rating from 36,983 anonymous pairwise votes.MiMo-V2.5-Pro: Style-controlled Arena rating from 43,689 anonymous pairwise votes. | 1,431.271 95% confidence interval: ±5.416The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | Winner1,473.632 95% confidence interval: ±5.043The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | LMArenaSource detailsData as of: 09/01/2026 |
LMArena Text, Style ControlExcluding tiesTest detailsTest setup not documented as identicalNo direct winnerVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterDeepSeek-V4-Flash: Snapshot: deepseek-v4-flash-high-preview, Reasoning: high, Harness: Arena text, style control MiMo-V2.5-Pro: Snapshot: mimo-v2.5-pro, Harness: Arena text, style controlDeepSeek-V4-Flash: Style-controlled Arena rating from 37,039 anonymous pairwise votes.MiMo-V2.5-Pro: Style-controlled Arena rating from 43,689 anonymous pairwise votes. | 1,435.7 95% confidence interval: ±5.462The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | Higher measured value1,473.632 95% confidence interval: ±5.043The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | LMArenaSource detailsData as of: 09/01/2026 |
LMArena Text, Style ControlExpert promptsTest detailsNo documented difference in the test setupVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterDeepSeek-V4-Flash: Snapshot: deepseek-v4-flash, Harness: Arena text, style control MiMo-V2.5-Pro: Snapshot: mimo-v2.5-pro, Harness: Arena text, style controlDeepSeek-V4-Flash: Style-controlled Arena rating from 4,904 anonymous pairwise votes.MiMo-V2.5-Pro: Style-controlled Arena rating from 5,454 anonymous pairwise votes. | 1,458.425 95% confidence interval: ±9.147The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | Winner1,505.424 95% confidence interval: ±8.821The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | LMArenaSource detailsData as of: 09/01/2026 |
LMArena Text, Style ControlExpert promptsTest detailsTest setup not documented as identicalNo direct winnerVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterDeepSeek-V4-Flash: Snapshot: deepseek-v4-flash-high-preview, Reasoning: high, Harness: Arena text, style control MiMo-V2.5-Pro: Snapshot: mimo-v2.5-pro, Harness: Arena text, style controlDeepSeek-V4-Flash: Style-controlled Arena rating from 4,907 anonymous pairwise votes.MiMo-V2.5-Pro: Style-controlled Arena rating from 5,454 anonymous pairwise votes. | 1,467.744 95% confidence interval: ±9.211The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | Higher measured value1,505.424 95% confidence interval: ±8.821The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | LMArenaSource detailsData as of: 09/01/2026 |
LMArena Text, Style ControlFrenchTest detailsNo documented difference in the test setupVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterDeepSeek-V4-Flash: Snapshot: deepseek-v4-flash, Harness: Arena text, style control MiMo-V2.5-Pro: Snapshot: mimo-v2.5-pro, Harness: Arena text, style controlDeepSeek-V4-Flash: Style-controlled Arena rating from 1,909 anonymous pairwise votes.MiMo-V2.5-Pro: Style-controlled Arena rating from 2,168 anonymous pairwise votes. | 1,444.246 95% confidence interval: ±15.542The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | Winner1,490.605 95% confidence interval: ±14.949The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | LMArenaSource detailsData as of: 09/01/2026 |
LMArena Text, Style ControlFrenchTest detailsTest setup not documented as identicalNo direct winnerVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterDeepSeek-V4-Flash: Snapshot: deepseek-v4-flash-high-preview, Reasoning: high, Harness: Arena text, style control MiMo-V2.5-Pro: Snapshot: mimo-v2.5-pro, Harness: Arena text, style controlDeepSeek-V4-Flash: Style-controlled Arena rating from 1,872 anonymous pairwise votes.MiMo-V2.5-Pro: Style-controlled Arena rating from 2,168 anonymous pairwise votes. | 1,457.512 95% confidence interval: ±15.76The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | Higher measured value1,490.605 95% confidence interval: ±14.949The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | LMArenaSource detailsData as of: 09/01/2026 |
LMArena Text, Style ControlGermanTest detailsNo documented difference in the test setupNo clear leadVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterDeepSeek-V4-Flash: Snapshot: deepseek-v4-flash, Harness: Arena text, style control MiMo-V2.5-Pro: Snapshot: mimo-v2.5-pro, Harness: Arena text, style controlDeepSeek-V4-Flash: Style-controlled Arena rating from 834 anonymous pairwise votes.MiMo-V2.5-Pro: Style-controlled Arena rating from 976 anonymous pairwise votes. | 1,423.985 95% confidence interval: ±21.432The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | No clear lead1,464.435 95% confidence interval: ±20.371The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | LMArenaSource detailsData as of: 09/01/2026 |
LMArena Text, Style ControlGermanTest detailsTest setup not documented as identicalNo direct winnerVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterDeepSeek-V4-Flash: Snapshot: deepseek-v4-flash-high-preview, Reasoning: high, Harness: Arena text, style control MiMo-V2.5-Pro: Snapshot: mimo-v2.5-pro, Harness: Arena text, style controlDeepSeek-V4-Flash: Style-controlled Arena rating from 881 anonymous pairwise votes.MiMo-V2.5-Pro: Style-controlled Arena rating from 976 anonymous pairwise votes. | 1,434.001 95% confidence interval: ±20.992The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | Higher measured value1,464.435 95% confidence interval: ±20.371The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | LMArenaSource detailsData as of: 09/01/2026 |
LMArena Text, Style ControlHard promptsTest detailsNo documented difference in the test setupVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterDeepSeek-V4-Flash: Snapshot: deepseek-v4-flash, Harness: Arena text, style control MiMo-V2.5-Pro: Snapshot: mimo-v2.5-pro, Harness: Arena text, style controlDeepSeek-V4-Flash: Style-controlled Arena rating from 32,576 anonymous pairwise votes.MiMo-V2.5-Pro: Style-controlled Arena rating from 37,619 anonymous pairwise votes. | 1,459.19 95% confidence interval: ±4.879The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | Winner1,496.232 95% confidence interval: ±4.621The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | LMArenaSource detailsData as of: 09/01/2026 |
LMArena Text, Style ControlHard promptsTest detailsTest setup not documented as identicalNo direct winnerVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterDeepSeek-V4-Flash: Snapshot: deepseek-v4-flash-high-preview, Reasoning: high, Harness: Arena text, style control MiMo-V2.5-Pro: Snapshot: mimo-v2.5-pro, Harness: Arena text, style controlDeepSeek-V4-Flash: Style-controlled Arena rating from 32,479 anonymous pairwise votes.MiMo-V2.5-Pro: Style-controlled Arena rating from 37,619 anonymous pairwise votes. | 1,458.492 95% confidence interval: ±4.934The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | Higher measured value1,496.232 95% confidence interval: ±4.621The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | LMArenaSource detailsData as of: 09/01/2026 |
LMArena Text, Style ControlHard prompts, EnglishTest detailsNo documented difference in the test setupVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterDeepSeek-V4-Flash: Snapshot: deepseek-v4-flash, Harness: Arena text, style control MiMo-V2.5-Pro: Snapshot: mimo-v2.5-pro, Harness: Arena text, style controlDeepSeek-V4-Flash: Style-controlled Arena rating from 15,327 anonymous pairwise votes.MiMo-V2.5-Pro: Style-controlled Arena rating from 16,903 anonymous pairwise votes. | 1,464.306 95% confidence interval: ±6.191The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | Winner1,503.672 95% confidence interval: ±5.935The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | LMArenaSource detailsData as of: 09/01/2026 |
LMArena Text, Style ControlHard prompts, EnglishTest detailsTest setup not documented as identicalNo direct winnerVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterDeepSeek-V4-Flash: Snapshot: deepseek-v4-flash-high-preview, Reasoning: high, Harness: Arena text, style control MiMo-V2.5-Pro: Snapshot: mimo-v2.5-pro, Harness: Arena text, style controlDeepSeek-V4-Flash: Style-controlled Arena rating from 15,135 anonymous pairwise votes.MiMo-V2.5-Pro: Style-controlled Arena rating from 16,903 anonymous pairwise votes. | 1,465.194 95% confidence interval: ±6.261The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | Higher measured value1,503.672 95% confidence interval: ±5.935The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | LMArenaSource detailsData as of: 09/01/2026 |
LMArena Text, Style ControlInstruction followingTest detailsNo documented difference in the test setupVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterDeepSeek-V4-Flash: Snapshot: deepseek-v4-flash, Harness: Arena text, style control MiMo-V2.5-Pro: Snapshot: mimo-v2.5-pro, Harness: Arena text, style controlDeepSeek-V4-Flash: Style-controlled Arena rating from 16,772 anonymous pairwise votes.MiMo-V2.5-Pro: Style-controlled Arena rating from 18,986 anonymous pairwise votes. | 1,428.139 95% confidence interval: ±5.955The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | Winner1,470.886 95% confidence interval: ±5.661The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | LMArenaSource detailsData as of: 09/01/2026 |
LMArena Text, Style ControlInstruction followingTest detailsTest setup not documented as identicalNo direct winnerVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterDeepSeek-V4-Flash: Snapshot: deepseek-v4-flash-high-preview, Reasoning: high, Harness: Arena text, style control MiMo-V2.5-Pro: Snapshot: mimo-v2.5-pro, Harness: Arena text, style controlDeepSeek-V4-Flash: Style-controlled Arena rating from 16,813 anonymous pairwise votes.MiMo-V2.5-Pro: Style-controlled Arena rating from 18,986 anonymous pairwise votes. | 1,433.908 95% confidence interval: ±6.024The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | Higher measured value1,470.886 95% confidence interval: ±5.661The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | LMArenaSource detailsData as of: 09/01/2026 |
LMArena Text, Style ControlJapaneseTest detailsNo documented difference in the test setupNo clear leadVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterDeepSeek-V4-Flash: Snapshot: deepseek-v4-flash, Harness: Arena text, style control MiMo-V2.5-Pro: Snapshot: mimo-v2.5-pro, Harness: Arena text, style controlDeepSeek-V4-Flash: Style-controlled Arena rating from 633 anonymous pairwise votes.MiMo-V2.5-Pro: Style-controlled Arena rating from 720 anonymous pairwise votes. | 1,397.389 95% confidence interval: ±25.351The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | No clear lead1,419.95 95% confidence interval: ±24.305The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | LMArenaSource detailsData as of: 09/01/2026 |
LMArena Text, Style ControlJapaneseTest detailsTest setup not documented as identicalNo direct winnerVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterDeepSeek-V4-Flash: Snapshot: deepseek-v4-flash-high-preview, Reasoning: high, Harness: Arena text, style control MiMo-V2.5-Pro: Snapshot: mimo-v2.5-pro, Harness: Arena text, style controlDeepSeek-V4-Flash: Style-controlled Arena rating from 600 anonymous pairwise votes.MiMo-V2.5-Pro: Style-controlled Arena rating from 720 anonymous pairwise votes. | Higher measured value1,422.217 95% confidence interval: ±25.99The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | 1,419.95 95% confidence interval: ±24.305The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | LMArenaSource detailsData as of: 09/01/2026 |
LMArena Text, Style ControlKoreanTest detailsNo documented difference in the test setupVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterDeepSeek-V4-Flash: Snapshot: deepseek-v4-flash, Harness: Arena text, style control MiMo-V2.5-Pro: Snapshot: mimo-v2.5-pro, Harness: Arena text, style controlDeepSeek-V4-Flash: Style-controlled Arena rating from 867 anonymous pairwise votes.MiMo-V2.5-Pro: Style-controlled Arena rating from 1,085 anonymous pairwise votes. | 1,394.225 95% confidence interval: ±21.434The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | Winner1,437.743 95% confidence interval: ±19.601The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | LMArenaSource detailsData as of: 09/01/2026 |
LMArena Text, Style ControlKoreanTest detailsTest setup not documented as identicalNo direct winnerVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterDeepSeek-V4-Flash: Snapshot: deepseek-v4-flash-high-preview, Reasoning: high, Harness: Arena text, style control MiMo-V2.5-Pro: Snapshot: mimo-v2.5-pro, Harness: Arena text, style controlDeepSeek-V4-Flash: Style-controlled Arena rating from 909 anonymous pairwise votes.MiMo-V2.5-Pro: Style-controlled Arena rating from 1,085 anonymous pairwise votes. | 1,374.943 95% confidence interval: ±21.551The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | Higher measured value1,437.743 95% confidence interval: ±19.601The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | LMArenaSource detailsData as of: 09/01/2026 |
LMArena Text, Style ControlLegal and governmentTest detailsNo documented difference in the test setupVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterDeepSeek-V4-Flash: Snapshot: deepseek-v4-flash, Harness: Arena text, style control MiMo-V2.5-Pro: Snapshot: mimo-v2.5-pro, Harness: Arena text, style controlDeepSeek-V4-Flash: Style-controlled Arena rating from 3,892 anonymous pairwise votes.MiMo-V2.5-Pro: Style-controlled Arena rating from 4,667 anonymous pairwise votes. | 1,449.174 95% confidence interval: ±10.185The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | Winner1,475.096 95% confidence interval: ±9.506The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | LMArenaSource detailsData as of: 09/01/2026 |
LMArena Text, Style ControlLegal and governmentTest detailsTest setup not documented as identicalNo direct winnerVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterDeepSeek-V4-Flash: Snapshot: deepseek-v4-flash-high-preview, Reasoning: high, Harness: Arena text, style control MiMo-V2.5-Pro: Snapshot: mimo-v2.5-pro, Harness: Arena text, style controlDeepSeek-V4-Flash: Style-controlled Arena rating from 3,872 anonymous pairwise votes.MiMo-V2.5-Pro: Style-controlled Arena rating from 4,667 anonymous pairwise votes. | 1,459.091 95% confidence interval: ±10.242The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | Higher measured value1,475.096 95% confidence interval: ±9.506The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | LMArenaSource detailsData as of: 09/01/2026 |
LMArena Text, Style ControlLife, physical and social scienceTest detailsNo documented difference in the test setupVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterDeepSeek-V4-Flash: Snapshot: deepseek-v4-flash, Harness: Arena text, style control MiMo-V2.5-Pro: Snapshot: mimo-v2.5-pro, Harness: Arena text, style controlDeepSeek-V4-Flash: Style-controlled Arena rating from 7,776 anonymous pairwise votes.MiMo-V2.5-Pro: Style-controlled Arena rating from 9,330 anonymous pairwise votes. | 1,458.608 95% confidence interval: ±7.61The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | Winner1,489.986 95% confidence interval: ±7.065The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | LMArenaSource detailsData as of: 09/01/2026 |
LMArena Text, Style ControlLife, physical and social scienceTest detailsTest setup not documented as identicalNo direct winnerVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterDeepSeek-V4-Flash: Snapshot: deepseek-v4-flash-high-preview, Reasoning: high, Harness: Arena text, style control MiMo-V2.5-Pro: Snapshot: mimo-v2.5-pro, Harness: Arena text, style controlDeepSeek-V4-Flash: Style-controlled Arena rating from 7,968 anonymous pairwise votes.MiMo-V2.5-Pro: Style-controlled Arena rating from 9,330 anonymous pairwise votes. | 1,460.882 95% confidence interval: ±7.588The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | Higher measured value1,489.986 95% confidence interval: ±7.065The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | LMArenaSource detailsData as of: 09/01/2026 |
LMArena Text, Style ControlLonger queriesTest detailsNo documented difference in the test setupVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterDeepSeek-V4-Flash: Snapshot: deepseek-v4-flash, Harness: Arena text, style control MiMo-V2.5-Pro: Snapshot: mimo-v2.5-pro, Harness: Arena text, style controlDeepSeek-V4-Flash: Style-controlled Arena rating from 21,561 anonymous pairwise votes.MiMo-V2.5-Pro: Style-controlled Arena rating from 25,308 anonymous pairwise votes. | 1,448.456 95% confidence interval: ±5.733The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | Winner1,486.38 95% confidence interval: ±5.381The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | LMArenaSource detailsData as of: 09/01/2026 |
LMArena Text, Style ControlLonger queriesTest detailsTest setup not documented as identicalNo direct winnerVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterDeepSeek-V4-Flash: Snapshot: deepseek-v4-flash-high-preview, Reasoning: high, Harness: Arena text, style control MiMo-V2.5-Pro: Snapshot: mimo-v2.5-pro, Harness: Arena text, style controlDeepSeek-V4-Flash: Style-controlled Arena rating from 21,664 anonymous pairwise votes.MiMo-V2.5-Pro: Style-controlled Arena rating from 25,308 anonymous pairwise votes. | 1,449.036 95% confidence interval: ±5.731The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | Higher measured value1,486.38 95% confidence interval: ±5.381The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | LMArenaSource detailsData as of: 09/01/2026 |
LMArena Text, Style ControlMathTest detailsNo documented difference in the test setupVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterDeepSeek-V4-Flash: Snapshot: deepseek-v4-flash, Harness: Arena text, style control MiMo-V2.5-Pro: Snapshot: mimo-v2.5-pro, Harness: Arena text, style controlDeepSeek-V4-Flash: Style-controlled Arena rating from 2,516 anonymous pairwise votes.MiMo-V2.5-Pro: Style-controlled Arena rating from 2,709 anonymous pairwise votes. | 1,425.091 95% confidence interval: ±12.209The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | Winner1,476.197 95% confidence interval: ±11.79The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | LMArenaSource detailsData as of: 09/01/2026 |
LMArena Text, Style ControlMathTest detailsTest setup not documented as identicalNo direct winnerVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterDeepSeek-V4-Flash: Snapshot: deepseek-v4-flash-high-preview, Reasoning: high, Harness: Arena text, style control MiMo-V2.5-Pro: Snapshot: mimo-v2.5-pro, Harness: Arena text, style controlDeepSeek-V4-Flash: Style-controlled Arena rating from 2,459 anonymous pairwise votes.MiMo-V2.5-Pro: Style-controlled Arena rating from 2,709 anonymous pairwise votes. | 1,441.301 95% confidence interval: ±12.311The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | Higher measured value1,476.197 95% confidence interval: ±11.79The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | LMArenaSource detailsData as of: 09/01/2026 |
LMArena Text, Style ControlMathematical professionsTest detailsNo documented difference in the test setupVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterDeepSeek-V4-Flash: Snapshot: deepseek-v4-flash, Harness: Arena text, style control MiMo-V2.5-Pro: Snapshot: mimo-v2.5-pro, Harness: Arena text, style controlDeepSeek-V4-Flash: Style-controlled Arena rating from 2,746 anonymous pairwise votes.MiMo-V2.5-Pro: Style-controlled Arena rating from 3,049 anonymous pairwise votes. | 1,431.608 95% confidence interval: ±11.935The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | Winner1,490.74 95% confidence interval: ±11.451The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | LMArenaSource detailsData as of: 09/01/2026 |
LMArena Text, Style ControlMathematical professionsTest detailsTest setup not documented as identicalNo direct winnerVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterDeepSeek-V4-Flash: Snapshot: deepseek-v4-flash-high-preview, Reasoning: high, Harness: Arena text, style control MiMo-V2.5-Pro: Snapshot: mimo-v2.5-pro, Harness: Arena text, style controlDeepSeek-V4-Flash: Style-controlled Arena rating from 2,607 anonymous pairwise votes.MiMo-V2.5-Pro: Style-controlled Arena rating from 3,049 anonymous pairwise votes. | 1,443.348 95% confidence interval: ±12.313The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | Higher measured value1,490.74 95% confidence interval: ±11.451The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | LMArenaSource detailsData as of: 09/01/2026 |
LMArena Text, Style ControlMedicine and healthcareTest detailsNo documented difference in the test setupVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterDeepSeek-V4-Flash: Snapshot: deepseek-v4-flash, Harness: Arena text, style control MiMo-V2.5-Pro: Snapshot: mimo-v2.5-pro, Harness: Arena text, style controlDeepSeek-V4-Flash: Style-controlled Arena rating from 3,429 anonymous pairwise votes.MiMo-V2.5-Pro: Style-controlled Arena rating from 4,093 anonymous pairwise votes. | 1,459.604 95% confidence interval: ±10.945The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | Winner1,487.611 95% confidence interval: ±10.209The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | LMArenaSource detailsData as of: 09/01/2026 |
LMArena Text, Style ControlMedicine and healthcareTest detailsTest setup not documented as identicalNo direct winnerVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterDeepSeek-V4-Flash: Snapshot: deepseek-v4-flash-high-preview, Reasoning: high, Harness: Arena text, style control MiMo-V2.5-Pro: Snapshot: mimo-v2.5-pro, Harness: Arena text, style controlDeepSeek-V4-Flash: Style-controlled Arena rating from 3,495 anonymous pairwise votes.MiMo-V2.5-Pro: Style-controlled Arena rating from 4,093 anonymous pairwise votes. | 1,462.945 95% confidence interval: ±10.866The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | Higher measured value1,487.611 95% confidence interval: ±10.209The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | LMArenaSource detailsData as of: 09/01/2026 |
LMArena Text, Style ControlMulti-turnTest detailsNo documented difference in the test setupVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterDeepSeek-V4-Flash: Snapshot: deepseek-v4-flash, Harness: Arena text, style control MiMo-V2.5-Pro: Snapshot: mimo-v2.5-pro, Harness: Arena text, style controlDeepSeek-V4-Flash: Style-controlled Arena rating from 8,820 anonymous pairwise votes.MiMo-V2.5-Pro: Style-controlled Arena rating from 10,034 anonymous pairwise votes. | 1,452.356 95% confidence interval: ±7.462The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | Winner1,477.793 95% confidence interval: ±7.08The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | LMArenaSource detailsData as of: 09/01/2026 |
LMArena Text, Style ControlMulti-turnTest detailsTest setup not documented as identicalNo direct winnerVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterDeepSeek-V4-Flash: Snapshot: deepseek-v4-flash-high-preview, Reasoning: high, Harness: Arena text, style control MiMo-V2.5-Pro: Snapshot: mimo-v2.5-pro, Harness: Arena text, style controlDeepSeek-V4-Flash: Style-controlled Arena rating from 8,674 anonymous pairwise votes.MiMo-V2.5-Pro: Style-controlled Arena rating from 10,034 anonymous pairwise votes. | 1,445.683 95% confidence interval: ±7.508The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | Higher measured value1,477.793 95% confidence interval: ±7.08The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | LMArenaSource detailsData as of: 09/01/2026 |
LMArena Text, Style ControlNon-EnglishTest detailsNo documented difference in the test setupVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterDeepSeek-V4-Flash: Snapshot: deepseek-v4-flash, Harness: Arena text, style control MiMo-V2.5-Pro: Snapshot: mimo-v2.5-pro, Harness: Arena text, style controlDeepSeek-V4-Flash: Style-controlled Arena rating from 27,030 anonymous pairwise votes.MiMo-V2.5-Pro: Style-controlled Arena rating from 32,616 anonymous pairwise votes. | 1,423.067 95% confidence interval: ±5.056The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | Winner1,451.502 95% confidence interval: ±4.696The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | LMArenaSource detailsData as of: 09/01/2026 |
LMArena Text, Style ControlNon-EnglishTest detailsTest setup not documented as identicalNo direct winnerVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterDeepSeek-V4-Flash: Snapshot: deepseek-v4-flash-high-preview, Reasoning: high, Harness: Arena text, style control MiMo-V2.5-Pro: Snapshot: mimo-v2.5-pro, Harness: Arena text, style controlDeepSeek-V4-Flash: Style-controlled Arena rating from 26,956 anonymous pairwise votes.MiMo-V2.5-Pro: Style-controlled Arena rating from 32,616 anonymous pairwise votes. | 1,422.651 95% confidence interval: ±5.123The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | Higher measured value1,451.502 95% confidence interval: ±4.696The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | LMArenaSource detailsData as of: 09/01/2026 |
LMArena Text, Style ControlPolishTest detailsNo documented difference in the test setupNo clear leadVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterDeepSeek-V4-Flash: Snapshot: deepseek-v4-flash, Harness: Arena text, style control MiMo-V2.5-Pro: Snapshot: mimo-v2.5-pro, Harness: Arena text, style controlDeepSeek-V4-Flash: Style-controlled Arena rating from 1,005 anonymous pairwise votes.MiMo-V2.5-Pro: Style-controlled Arena rating from 1,102 anonymous pairwise votes. | 1,439.462 95% confidence interval: ±18.965The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | No clear lead1,469.555 95% confidence interval: ±18.134The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | LMArenaSource detailsData as of: 09/01/2026 |
LMArena Text, Style ControlPolishTest detailsTest setup not documented as identicalNo direct winnerVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterDeepSeek-V4-Flash: Snapshot: deepseek-v4-flash-high-preview, Reasoning: high, Harness: Arena text, style control MiMo-V2.5-Pro: Snapshot: mimo-v2.5-pro, Harness: Arena text, style controlDeepSeek-V4-Flash: Style-controlled Arena rating from 1,014 anonymous pairwise votes.MiMo-V2.5-Pro: Style-controlled Arena rating from 1,102 anonymous pairwise votes. | 1,430.358 95% confidence interval: ±18.866The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | Higher measured value1,469.555 95% confidence interval: ±18.134The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | LMArenaSource detailsData as of: 09/01/2026 |
LMArena Text, Style ControlRussianTest detailsNo documented difference in the test setupVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterDeepSeek-V4-Flash: Snapshot: deepseek-v4-flash, Harness: Arena text, style control MiMo-V2.5-Pro: Snapshot: mimo-v2.5-pro, Harness: Arena text, style controlDeepSeek-V4-Flash: Style-controlled Arena rating from 5,250 anonymous pairwise votes.MiMo-V2.5-Pro: Style-controlled Arena rating from 6,357 anonymous pairwise votes. | 1,433.186 95% confidence interval: ±8.845The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | Winner1,461.737 95% confidence interval: ±8.195The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | LMArenaSource detailsData as of: 09/01/2026 |
LMArena Text, Style ControlRussianTest detailsTest setup not documented as identicalNo direct winnerVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterDeepSeek-V4-Flash: Snapshot: deepseek-v4-flash-high-preview, Reasoning: high, Harness: Arena text, style control MiMo-V2.5-Pro: Snapshot: mimo-v2.5-pro, Harness: Arena text, style controlDeepSeek-V4-Flash: Style-controlled Arena rating from 5,207 anonymous pairwise votes.MiMo-V2.5-Pro: Style-controlled Arena rating from 6,357 anonymous pairwise votes. | 1,437.38 95% confidence interval: ±8.983The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | Higher measured value1,461.737 95% confidence interval: ±8.195The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | LMArenaSource detailsData as of: 09/01/2026 |
LMArena Text, Style ControlSoftware and IT servicesTest detailsNo documented difference in the test setupVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterDeepSeek-V4-Flash: Snapshot: deepseek-v4-flash, Harness: Arena text, style control MiMo-V2.5-Pro: Snapshot: mimo-v2.5-pro, Harness: Arena text, style controlDeepSeek-V4-Flash: Style-controlled Arena rating from 20,105 anonymous pairwise votes.MiMo-V2.5-Pro: Style-controlled Arena rating from 22,807 anonymous pairwise votes. | 1,471.075 95% confidence interval: ±5.634The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | Winner1,508.236 95% confidence interval: ±5.348The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | LMArenaSource detailsData as of: 09/01/2026 |
LMArena Text, Style ControlSoftware and IT servicesTest detailsTest setup not documented as identicalNo direct winnerVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterDeepSeek-V4-Flash: Snapshot: deepseek-v4-flash-high-preview, Reasoning: high, Harness: Arena text, style control MiMo-V2.5-Pro: Snapshot: mimo-v2.5-pro, Harness: Arena text, style controlDeepSeek-V4-Flash: Style-controlled Arena rating from 20,031 anonymous pairwise votes.MiMo-V2.5-Pro: Style-controlled Arena rating from 22,807 anonymous pairwise votes. | 1,473.269 95% confidence interval: ±5.664The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | Higher measured value1,508.236 95% confidence interval: ±5.348The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | LMArenaSource detailsData as of: 09/01/2026 |
LMArena Text, Style ControlSpanishTest detailsNo documented difference in the test setupNo clear leadVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterDeepSeek-V4-Flash: Snapshot: deepseek-v4-flash, Harness: Arena text, style control MiMo-V2.5-Pro: Snapshot: mimo-v2.5-pro, Harness: Arena text, style controlDeepSeek-V4-Flash: Style-controlled Arena rating from 1,548 anonymous pairwise votes.MiMo-V2.5-Pro: Style-controlled Arena rating from 1,747 anonymous pairwise votes. | 1,433.026 95% confidence interval: ±16.368The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | No clear lead1,458.581 95% confidence interval: ±15.611The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | LMArenaSource detailsData as of: 09/01/2026 |
LMArena Text, Style ControlSpanishTest detailsTest setup not documented as identicalNo direct winnerVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterDeepSeek-V4-Flash: Snapshot: deepseek-v4-flash-high-preview, Reasoning: high, Harness: Arena text, style control MiMo-V2.5-Pro: Snapshot: mimo-v2.5-pro, Harness: Arena text, style controlDeepSeek-V4-Flash: Style-controlled Arena rating from 1,443 anonymous pairwise votes.MiMo-V2.5-Pro: Style-controlled Arena rating from 1,747 anonymous pairwise votes. | 1,431.772 95% confidence interval: ±16.888The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | Higher measured value1,458.581 95% confidence interval: ±15.611The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | LMArenaSource detailsData as of: 09/01/2026 |
LMArena Text, Style ControlWriting, literature and languageTest detailsNo documented difference in the test setupVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterDeepSeek-V4-Flash: Snapshot: deepseek-v4-flash, Harness: Arena text, style control MiMo-V2.5-Pro: Snapshot: mimo-v2.5-pro, Harness: Arena text, style controlDeepSeek-V4-Flash: Style-controlled Arena rating from 11,742 anonymous pairwise votes.MiMo-V2.5-Pro: Style-controlled Arena rating from 14,537 anonymous pairwise votes. | 1,417.982 95% confidence interval: ±6.712The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | Winner1,452.221 95% confidence interval: ±6.177The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | LMArenaSource detailsData as of: 09/01/2026 |
LMArena Text, Style ControlWriting, literature and languageTest detailsTest setup not documented as identicalNo direct winnerVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterDeepSeek-V4-Flash: Snapshot: deepseek-v4-flash-high-preview, Reasoning: high, Harness: Arena text, style control MiMo-V2.5-Pro: Snapshot: mimo-v2.5-pro, Harness: Arena text, style controlDeepSeek-V4-Flash: Style-controlled Arena rating from 11,861 anonymous pairwise votes.MiMo-V2.5-Pro: Style-controlled Arena rating from 14,537 anonymous pairwise votes. | 1,421.395 95% confidence interval: ±6.717The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | Higher measured value1,452.221 95% confidence interval: ±6.177The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | LMArenaSource detailsData as of: 09/01/2026 |
Key to the marks:better valuebetter, but not conclusivetie | |||
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