Head-to-head comparison
DeepSeek-V4-Flash vs. GLM-5.1
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
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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 | GLM-5.1 |
|---|---|---|
| Provider | DeepSeek | Z.ai |
| Released | Apr 24, 2026 | Apr 7, 2026 |
| Availability | Preview | Open Source |
| Model type | Open Weights | Open Weights |
| Parameters | 284B, 13B active | 744B, 40B active |
| Architecture | Mixture of Experts | Mixture of Experts |
| Context window | 1,000,000 tokens | 200,000 tokens |
| Knowledge cutoff | Not published | Not published |
| Technical sources | Model | Model, Context |
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 | GLM-5.1 |
|---|---|---|
| API input | $0.14 | $1.4 |
| API output | $0.28 | $4.4 |
| Cache read | $0. | $0.26 |
| Cache write (5 min.) | Not listed | Not listed |
| Cache write (1 hr.) | Not listed | Not listed |
| Price verified | 07/30/2026 Source | 07/30/2026 Source |
DeepSeek-V4-FlashGLM-5.1
API inputUSD per 1M tokens, base tier
DeepSeek-V4-FlashLower price$0.14
GLM-5.1$1.4
API outputUSD per 1M tokens, base tier
DeepSeek-V4-FlashLower price$0.28
GLM-5.1$4.4
Cache readUSD per 1M tokens, base tier
DeepSeek-V4-FlashLower price$0.003
GLM-5.1$0.26
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 | |
| GLM-5.1 | Z.ai | Direct from developerStandard API | $1.4 | $4.4 | Source07/30/2026 |
| Alibaba | Via OpenRouteralibaba/fp8 | $1.33 | $4.18 | Source09/07/2026 | |
| AtlasCloud | Via OpenRouteratlas-cloud/fp8 | $1.26 | $3.96 | Source09/07/2026 | |
| Baidu | Via OpenRouterbaidu/fp8 | $1.4 | $4.4 | Source09/07/2026 | |
| Chutes | Via OpenRouterchutes/fp8 | $0.98 | $3.08 | Source09/07/2026 | |
| Crusoe | Via OpenRoutercrusoe/fp8 | $1.2 | $4.4 | Source09/07/2026 | |
| DeepInfra | Via OpenRouterdeepinfra/fp4 | $1.05 | $3.5 | Source09/07/2026 | |
| DigitalOcean | Via OpenRouterdigitalocean | $1.3 | $4.3 | Source09/07/2026 | |
| Friendli | Via OpenRouterfriendli | $1.4 | $4.4 | Source09/07/2026 | |
| GMICloud | Via OpenRoutergmicloud/fp8 | Lowest listed price: $0.91 | Lowest listed price: $2.86 | Source09/07/2026 | |
| Nebius | Via OpenRouternebius/fp8 | $1.4 | $4.4 | Source09/07/2026 | |
| Novita | Via OpenRouternovita/fp8 | $1.38 | $4.4 | Source09/07/2026 | |
| Phala | Via OpenRouterphala | $1.21 | $4.2 | Source09/07/2026 | |
| SiliconFlow | Via OpenRoutersiliconflow/fp8 | $1.19 | $3.74 | Source09/07/2026 | |
| StreamLake | Via OpenRouterstreamlake/fp8 | $0.966 | $3.036 | Source09/07/2026 | |
| Venice | Via OpenRoutervenice/fp8 | $1.54 | $4.84 | Source09/07/2026 | |
| Z.AI | Via OpenRouterz-ai/fp8 | $1.4 | $4.4 | 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
GLM-5.1
Coding: 98 / 100 (1 benchmark family)
Reasoning: 97.8 / 100 (1 benchmark family)
Mathematics: 96.7 / 100 (1 benchmark family)
Knowledge: 97.8 / 100 (1 benchmark family)
Finance: 98.2 / 100 (1 benchmark family)
Legal: 98.2 / 100 (1 benchmark family)
Health: 98.4 / 100 (1 benchmark family)
General: 97.8 / 100 (1 benchmark family)
29 matched rows from 1 benchmark families were considered. The radar shows 8 of 8 comparable categories.
DeepSeek-V4-FlashGLM-5.1
LMArena Text, Style ControlOverall. Higher is better. No documented setup difference
DeepSeek-V4-Flash1,435.816
GLM-5.1Winner1,466.019
LMArena Text, Style ControlOverall. Higher is better. Test setup not documented as identical
DeepSeek-V4-Flash1,438.462
GLM-5.1Higher measured value1,466.019
LMArena Text, Style ControlBusiness, management and finance. Higher is better. No documented setup difference
DeepSeek-V4-Flash1,437.854
GLM-5.1Winner1,464.877
LMArena Text, Style ControlBusiness, management and finance. Higher is better. Test setup not documented as identical
DeepSeek-V4-Flash1,434.968
GLM-5.1Higher measured value1,464.877
LMArena Text, Style ControlChinese. Higher is better. No documented setup difference
DeepSeek-V4-Flash1,472.677
GLM-5.1Winner1,516.722
LMArena Text, Style ControlChinese. Higher is better. Test setup not documented as identical
DeepSeek-V4-Flash1,479.62
GLM-5.1Higher measured value1,516.722
LMArena Text, Style ControlCoding. Higher is better. No documented setup difference
DeepSeek-V4-Flash1,483.101
GLM-5.1Winner1,513.669
LMArena Text, Style ControlCoding. Higher is better. Test setup not documented as identical
DeepSeek-V4-Flash1,479.449
GLM-5.1Higher measured value1,513.669
LMArena Text, Style ControlCreative writing. Higher is better. No documented setup difference
DeepSeek-V4-Flash1,408.18
GLM-5.1Winner1,447.489
LMArena Text, Style ControlCreative writing. Higher is better. Test setup not documented as identical
DeepSeek-V4-Flash1,408.903
GLM-5.1Higher measured value1,447.489
LMArena Text, Style ControlEnglish. Higher is better. No documented setup difference
DeepSeek-V4-Flash1,445.287
GLM-5.1Winner1,480.022
LMArena Text, Style ControlEnglish. Higher is better. Test setup not documented as identical
DeepSeek-V4-Flash1,449.894
GLM-5.1Higher measured value1,480.022
Key to the marks:better valuebetter, but not conclusivetie
| Benchmark and task | DeepSeek-V4-Flash | GLM-5.1 | 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 GLM-5.1: Snapshot: glm-5.1, Harness: Arena text, style controlDeepSeek-V4-Flash: Style-controlled Arena rating from 48,963 anonymous pairwise votes.GLM-5.1: Style-controlled Arena rating from 45,403 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. | Winner1,466.019 95% confidence interval: ±3.982The 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 GLM-5.1: Snapshot: glm-5.1, Harness: Arena text, style controlDeepSeek-V4-Flash: Style-controlled Arena rating from 48,705 anonymous pairwise votes.GLM-5.1: Style-controlled Arena rating from 45,403 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 value1,466.019 95% confidence interval: ±3.982The 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 GLM-5.1: Snapshot: glm-5.1, Harness: Arena text, style controlDeepSeek-V4-Flash: Style-controlled Arena rating from 9,911 anonymous pairwise votes.GLM-5.1: Style-controlled Arena rating from 9,036 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. | Winner1,464.877 95% confidence interval: ±7.07The 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 GLM-5.1: Snapshot: glm-5.1, Harness: Arena text, style controlDeepSeek-V4-Flash: Style-controlled Arena rating from 10,060 anonymous pairwise votes.GLM-5.1: Style-controlled Arena rating from 9,036 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 value1,464.877 95% confidence interval: ±7.07The 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 GLM-5.1: Snapshot: glm-5.1, Harness: Arena text, style controlDeepSeek-V4-Flash: Style-controlled Arena rating from 2,530 anonymous pairwise votes.GLM-5.1: Style-controlled Arena rating from 2,742 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. | Winner1,516.722 95% confidence interval: ±12.084The 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 GLM-5.1: Snapshot: glm-5.1, Harness: Arena text, style controlDeepSeek-V4-Flash: Style-controlled Arena rating from 2,509 anonymous pairwise votes.GLM-5.1: Style-controlled Arena rating from 2,742 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 value1,516.722 95% confidence interval: ±12.084The 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 GLM-5.1: Snapshot: glm-5.1, Harness: Arena text, style controlDeepSeek-V4-Flash: Style-controlled Arena rating from 14,346 anonymous pairwise votes.GLM-5.1: Style-controlled Arena rating from 12,659 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. | Winner1,513.669 95% confidence interval: ±6.252The 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 GLM-5.1: Snapshot: glm-5.1, Harness: Arena text, style controlDeepSeek-V4-Flash: Style-controlled Arena rating from 14,310 anonymous pairwise votes.GLM-5.1: Style-controlled Arena rating from 12,659 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 value1,513.669 95% confidence interval: ±6.252The 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 GLM-5.1: Snapshot: glm-5.1, Harness: Arena text, style controlDeepSeek-V4-Flash: Style-controlled Arena rating from 7,972 anonymous pairwise votes.GLM-5.1: Style-controlled Arena rating from 8,409 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. | Winner1,447.489 95% confidence interval: ±7.46The 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 GLM-5.1: Snapshot: glm-5.1, Harness: Arena text, style controlDeepSeek-V4-Flash: Style-controlled Arena rating from 8,029 anonymous pairwise votes.GLM-5.1: Style-controlled Arena rating from 8,409 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 value1,447.489 95% confidence interval: ±7.46The 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 GLM-5.1: Snapshot: glm-5.1, Harness: Arena text, style controlDeepSeek-V4-Flash: Style-controlled Arena rating from 21,931 anonymous pairwise votes.GLM-5.1: Style-controlled Arena rating from 20,248 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. | Winner1,480.022 95% confidence interval: ±5.164The 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 GLM-5.1: Snapshot: glm-5.1, Harness: Arena text, style controlDeepSeek-V4-Flash: Style-controlled Arena rating from 21,747 anonymous pairwise votes.GLM-5.1: Style-controlled Arena rating from 20,248 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 value1,480.022 95% confidence interval: ±5.164The 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 GLM-5.1: Snapshot: glm-5.1, Harness: Arena text, style controlDeepSeek-V4-Flash: Style-controlled Arena rating from 10,423 anonymous pairwise votes.GLM-5.1: Style-controlled Arena rating from 10,350 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. | Winner1,442.227 95% confidence interval: ±6.829The 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 GLM-5.1: Snapshot: glm-5.1, Harness: Arena text, style controlDeepSeek-V4-Flash: Style-controlled Arena rating from 10,655 anonymous pairwise votes.GLM-5.1: Style-controlled Arena rating from 10,350 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 value1,442.227 95% confidence interval: ±6.829The 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 GLM-5.1: Snapshot: glm-5.1, Harness: Arena text, style controlDeepSeek-V4-Flash: Style-controlled Arena rating from 36,983 anonymous pairwise votes.GLM-5.1: Style-controlled Arena rating from 34,041 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. | Winner1,472.225 95% confidence interval: ±5.215The 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 GLM-5.1: Snapshot: glm-5.1, Harness: Arena text, style controlDeepSeek-V4-Flash: Style-controlled Arena rating from 37,039 anonymous pairwise votes.GLM-5.1: Style-controlled Arena rating from 34,041 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 value1,472.225 95% confidence interval: ±5.215The 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 GLM-5.1: Snapshot: glm-5.1, Harness: Arena text, style controlDeepSeek-V4-Flash: Style-controlled Arena rating from 4,904 anonymous pairwise votes.GLM-5.1: Style-controlled Arena rating from 4,692 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. | Winner1,495.539 95% confidence interval: ±9.271The 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 GLM-5.1: Snapshot: glm-5.1, Harness: Arena text, style controlDeepSeek-V4-Flash: Style-controlled Arena rating from 4,907 anonymous pairwise votes.GLM-5.1: Style-controlled Arena rating from 4,692 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 value1,495.539 95% confidence interval: ±9.271The 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 GLM-5.1: Snapshot: glm-5.1, Harness: Arena text, style controlDeepSeek-V4-Flash: Style-controlled Arena rating from 1,909 anonymous pairwise votes.GLM-5.1: Style-controlled Arena rating from 1,617 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. | Winner1,486.176 95% confidence interval: ±16.508The 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 GLM-5.1: Snapshot: glm-5.1, Harness: Arena text, style controlDeepSeek-V4-Flash: Style-controlled Arena rating from 1,872 anonymous pairwise votes.GLM-5.1: Style-controlled Arena rating from 1,617 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 value1,486.176 95% confidence interval: ±16.508The 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 GLM-5.1: Snapshot: glm-5.1, Harness: Arena text, style controlDeepSeek-V4-Flash: Style-controlled Arena rating from 834 anonymous pairwise votes.GLM-5.1: Style-controlled Arena rating from 725 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 lead1,467.247 95% confidence interval: ±22.694The 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 GLM-5.1: Snapshot: glm-5.1, Harness: Arena text, style controlDeepSeek-V4-Flash: Style-controlled Arena rating from 881 anonymous pairwise votes.GLM-5.1: Style-controlled Arena rating from 725 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 value1,467.247 95% confidence interval: ±22.694The 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 GLM-5.1: Snapshot: glm-5.1, Harness: Arena text, style controlDeepSeek-V4-Flash: Style-controlled Arena rating from 32,576 anonymous pairwise votes.GLM-5.1: Style-controlled Arena rating from 29,974 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. | Winner1,488.383 95% confidence interval: ±4.664The 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 GLM-5.1: Snapshot: glm-5.1, Harness: Arena text, style controlDeepSeek-V4-Flash: Style-controlled Arena rating from 32,479 anonymous pairwise votes.GLM-5.1: Style-controlled Arena rating from 29,974 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 value1,488.383 95% confidence interval: ±4.664The 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 GLM-5.1: Snapshot: glm-5.1, Harness: Arena text, style controlDeepSeek-V4-Flash: Style-controlled Arena rating from 15,327 anonymous pairwise votes.GLM-5.1: Style-controlled Arena rating from 13,642 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. | Winner1,497.156 95% confidence interval: ±6.069The 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 GLM-5.1: Snapshot: glm-5.1, Harness: Arena text, style controlDeepSeek-V4-Flash: Style-controlled Arena rating from 15,135 anonymous pairwise votes.GLM-5.1: Style-controlled Arena rating from 13,642 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 value1,497.156 95% confidence interval: ±6.069The 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 GLM-5.1: Snapshot: glm-5.1, Harness: Arena text, style controlDeepSeek-V4-Flash: Style-controlled Arena rating from 16,772 anonymous pairwise votes.GLM-5.1: Style-controlled Arena rating from 15,738 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. | Winner1,459.874 95% confidence interval: ±5.685The 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 GLM-5.1: Snapshot: glm-5.1, Harness: Arena text, style controlDeepSeek-V4-Flash: Style-controlled Arena rating from 16,813 anonymous pairwise votes.GLM-5.1: Style-controlled Arena rating from 15,738 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 value1,459.874 95% confidence interval: ±5.685The 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 GLM-5.1: Snapshot: glm-5.1, Harness: Arena text, style controlDeepSeek-V4-Flash: Style-controlled Arena rating from 633 anonymous pairwise votes.GLM-5.1: Style-controlled Arena rating from 569 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 lead1,433.598 95% confidence interval: ±26.486The 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 GLM-5.1: Snapshot: glm-5.1, Harness: Arena text, style controlDeepSeek-V4-Flash: Style-controlled Arena rating from 600 anonymous pairwise votes.GLM-5.1: Style-controlled Arena rating from 569 anonymous pairwise votes. | 1,422.217 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. | Higher measured value1,433.598 95% confidence interval: ±26.486The 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 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 GLM-5.1: Snapshot: glm-5.1, Harness: Arena text, style controlDeepSeek-V4-Flash: Style-controlled Arena rating from 867 anonymous pairwise votes.GLM-5.1: Style-controlled Arena rating from 906 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. | No clear lead1,420.706 95% confidence interval: ±20.976The 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 GLM-5.1: Snapshot: glm-5.1, Harness: Arena text, style controlDeepSeek-V4-Flash: Style-controlled Arena rating from 909 anonymous pairwise votes.GLM-5.1: Style-controlled Arena rating from 906 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 value1,420.706 95% confidence interval: ±20.976The 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 GLM-5.1: Snapshot: glm-5.1, Harness: Arena text, style controlDeepSeek-V4-Flash: Style-controlled Arena rating from 3,892 anonymous pairwise votes.GLM-5.1: Style-controlled Arena rating from 3,614 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. | Winner1,475.668 95% confidence interval: ±10.397The 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 GLM-5.1: Snapshot: glm-5.1, Harness: Arena text, style controlDeepSeek-V4-Flash: Style-controlled Arena rating from 3,872 anonymous pairwise votes.GLM-5.1: Style-controlled Arena rating from 3,614 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 value1,475.668 95% confidence interval: ±10.397The 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 GLM-5.1: Snapshot: glm-5.1, Harness: Arena text, style controlDeepSeek-V4-Flash: Style-controlled Arena rating from 7,776 anonymous pairwise votes.GLM-5.1: Style-controlled Arena rating from 7,449 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. | Winner1,486.607 95% confidence interval: ±7.514The 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 GLM-5.1: Snapshot: glm-5.1, Harness: Arena text, style controlDeepSeek-V4-Flash: Style-controlled Arena rating from 7,968 anonymous pairwise votes.GLM-5.1: Style-controlled Arena rating from 7,449 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 value1,486.607 95% confidence interval: ±7.514The 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 GLM-5.1: Snapshot: glm-5.1, Harness: Arena text, style controlDeepSeek-V4-Flash: Style-controlled Arena rating from 21,561 anonymous pairwise votes.GLM-5.1: Style-controlled Arena rating from 20,421 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. | Winner1,481.572 95% confidence interval: ±5.447The 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 GLM-5.1: Snapshot: glm-5.1, Harness: Arena text, style controlDeepSeek-V4-Flash: Style-controlled Arena rating from 21,664 anonymous pairwise votes.GLM-5.1: Style-controlled Arena rating from 20,421 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 value1,481.572 95% confidence interval: ±5.447The 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 GLM-5.1: Snapshot: glm-5.1, Harness: Arena text, style controlDeepSeek-V4-Flash: Style-controlled Arena rating from 2,516 anonymous pairwise votes.GLM-5.1: Style-controlled Arena rating from 2,234 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. | Winner1,476.724 95% confidence interval: ±12.928The 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 GLM-5.1: Snapshot: glm-5.1, Harness: Arena text, style controlDeepSeek-V4-Flash: Style-controlled Arena rating from 2,459 anonymous pairwise votes.GLM-5.1: Style-controlled Arena rating from 2,234 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 value1,476.724 95% confidence interval: ±12.928The 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 GLM-5.1: Snapshot: glm-5.1, Harness: Arena text, style controlDeepSeek-V4-Flash: Style-controlled Arena rating from 2,746 anonymous pairwise votes.GLM-5.1: Style-controlled Arena rating from 2,428 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. | Winner1,477.716 95% confidence interval: ±12.657The 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 GLM-5.1: Snapshot: glm-5.1, Harness: Arena text, style controlDeepSeek-V4-Flash: Style-controlled Arena rating from 2,607 anonymous pairwise votes.GLM-5.1: Style-controlled Arena rating from 2,428 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 value1,477.716 95% confidence interval: ±12.657The 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 GLM-5.1: Snapshot: glm-5.1, Harness: Arena text, style controlDeepSeek-V4-Flash: Style-controlled Arena rating from 3,429 anonymous pairwise votes.GLM-5.1: Style-controlled Arena rating from 3,296 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. | Winner1,483.9 95% confidence interval: ±11.02The 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 GLM-5.1: Snapshot: glm-5.1, Harness: Arena text, style controlDeepSeek-V4-Flash: Style-controlled Arena rating from 3,495 anonymous pairwise votes.GLM-5.1: Style-controlled Arena rating from 3,296 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 value1,483.9 95% confidence interval: ±11.02The 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 GLM-5.1: Snapshot: glm-5.1, Harness: Arena text, style controlDeepSeek-V4-Flash: Style-controlled Arena rating from 8,820 anonymous pairwise votes.GLM-5.1: Style-controlled Arena rating from 7,394 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. | Winner1,477.368 95% confidence interval: ±7.627The 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 GLM-5.1: Snapshot: glm-5.1, Harness: Arena text, style controlDeepSeek-V4-Flash: Style-controlled Arena rating from 8,674 anonymous pairwise votes.GLM-5.1: Style-controlled Arena rating from 7,394 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 value1,477.368 95% confidence interval: ±7.627The 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 GLM-5.1: Snapshot: glm-5.1, Harness: Arena text, style controlDeepSeek-V4-Flash: Style-controlled Arena rating from 27,030 anonymous pairwise votes.GLM-5.1: Style-controlled Arena rating from 25,154 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. | Winner1,450.468 95% confidence interval: ±4.796The 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 GLM-5.1: Snapshot: glm-5.1, Harness: Arena text, style controlDeepSeek-V4-Flash: Style-controlled Arena rating from 26,956 anonymous pairwise votes.GLM-5.1: Style-controlled Arena rating from 25,154 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 value1,450.468 95% confidence interval: ±4.796The 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 GLM-5.1: Snapshot: glm-5.1, Harness: Arena text, style controlDeepSeek-V4-Flash: Style-controlled Arena rating from 1,005 anonymous pairwise votes.GLM-5.1: Style-controlled Arena rating from 886 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 lead1,447.998 95% confidence interval: ±19.624The 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 GLM-5.1: Snapshot: glm-5.1, Harness: Arena text, style controlDeepSeek-V4-Flash: Style-controlled Arena rating from 1,014 anonymous pairwise votes.GLM-5.1: Style-controlled Arena rating from 886 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 value1,447.998 95% confidence interval: ±19.624The 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 GLM-5.1: Snapshot: glm-5.1, Harness: Arena text, style controlDeepSeek-V4-Flash: Style-controlled Arena rating from 5,250 anonymous pairwise votes.GLM-5.1: Style-controlled Arena rating from 4,884 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. | Winner1,461.171 95% confidence interval: ±8.951The 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 GLM-5.1: Snapshot: glm-5.1, Harness: Arena text, style controlDeepSeek-V4-Flash: Style-controlled Arena rating from 5,207 anonymous pairwise votes.GLM-5.1: Style-controlled Arena rating from 4,884 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 value1,461.171 95% confidence interval: ±8.951The 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 GLM-5.1: Snapshot: glm-5.1, Harness: Arena text, style controlDeepSeek-V4-Flash: Style-controlled Arena rating from 20,105 anonymous pairwise votes.GLM-5.1: Style-controlled Arena rating from 18,168 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. | Winner1,501.543 95% confidence interval: ±5.397The 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 GLM-5.1: Snapshot: glm-5.1, Harness: Arena text, style controlDeepSeek-V4-Flash: Style-controlled Arena rating from 20,031 anonymous pairwise votes.GLM-5.1: Style-controlled Arena rating from 18,168 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 value1,501.543 95% confidence interval: ±5.397The 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 GLM-5.1: Snapshot: glm-5.1, Harness: Arena text, style controlDeepSeek-V4-Flash: Style-controlled Arena rating from 1,548 anonymous pairwise votes.GLM-5.1: Style-controlled Arena rating from 1,538 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 lead1,461.467 95% confidence interval: ±16.167The 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 GLM-5.1: Snapshot: glm-5.1, Harness: Arena text, style controlDeepSeek-V4-Flash: Style-controlled Arena rating from 1,443 anonymous pairwise votes.GLM-5.1: Style-controlled Arena rating from 1,538 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 value1,461.467 95% confidence interval: ±16.167The 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 GLM-5.1: Snapshot: glm-5.1, Harness: Arena text, style controlDeepSeek-V4-Flash: Style-controlled Arena rating from 11,742 anonymous pairwise votes.GLM-5.1: Style-controlled Arena rating from 11,635 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. | Winner1,454.24 95% confidence interval: ±6.448The 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 GLM-5.1: Snapshot: glm-5.1, Harness: Arena text, style controlDeepSeek-V4-Flash: Style-controlled Arena rating from 11,861 anonymous pairwise votes.GLM-5.1: Style-controlled Arena rating from 11,635 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 value1,454.24 95% confidence interval: ±6.448The 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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