Head-to-head comparison
Kimi K2.6 vs. Mistral Medium 3.5
Compare published benchmark results from matching versions and cohorts, API pricing, and technical specifications. Any documented test setup differences remain visible.
- shared result series
- 28
- 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 | Kimi K2.6 | Mistral Medium 3.5 |
|---|---|---|
| Provider | Moonshot AI | Mistral AI |
| Released | Apr 20, 2026 | Apr 28, 2026 |
| Availability | Active | Active |
| Model type | Open Weights | Open Weights |
| Parameters | 1T, 32B active | Not published |
| Architecture | Mixture of Experts | Not published |
| Context window | 262,144 tokens | 256,000 tokens |
| Knowledge cutoff | Not published | Not published |
| Technical sources | Model, Context | 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 | Kimi K2.6 | Mistral Medium 3.5 |
|---|---|---|
| API input | $0.95 | $1.5 |
| API output | $4 | $7.5 |
| Cache read | $0.16 | Not listed |
| 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 |
Kimi K2.6Mistral Medium 3.5
API inputUSD per 1M tokens, base tier
Kimi K2.6Lower price$0.95
Mistral Medium 3.5$1.5
API outputUSD per 1M tokens, base tier
Kimi K2.6Lower price$4
Mistral Medium 3.5$7.5
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 |
|---|---|---|---|---|---|
| Kimi K2.6 | Moonshot AI | Direct from developerStandard API | $0.95 | $4 | Source07/30/2026 |
| AtlasCloud | Via OpenRouteratlas-cloud/int4 | $0.95 | $4 | Source09/07/2026 | |
| Baidu | Via OpenRouterbaidu/fp4 | $0.95 | $4 | Source09/07/2026 | |
| BaseTen | Via OpenRouterbaseten/fp4#1 | $0.95 | $4 | Source09/07/2026 | |
| BaseTen | Via OpenRouterbaseten/fp4#2 | $0.95 | $4 | Source09/07/2026 | |
| Chutes | Via OpenRouterchutes/int4 | $0.58 | $3.4 | Source09/07/2026 | |
| Cloudflare | Via OpenRoutercloudflare | $0.95 | $4 | Source09/07/2026 | |
| CoreWeave | Via OpenRoutercoreweave/fp4 | $0.65 | $3.41 | Source09/07/2026 | |
| Crusoe | Via OpenRoutercrusoe/bf16 | $0.7 | $3.5 | Source09/07/2026 | |
| Decart | Via OpenRouterdecart/fp4 | $0.5865 | Lowest listed price: $2.4696 | Source09/07/2026 | |
| DeepInfra | Via OpenRouterdeepinfra/fp4 | $0.75 | $3.5 | Source09/07/2026 | |
| DigitalOcean | Via OpenRouterdigitalocean | $0.95 | $4 | Source09/07/2026 | |
| Fireworks | Via OpenRouterfireworks | $0.95 | $4 | Source09/07/2026 | |
| GMICloud | Via OpenRoutergmicloud/fp8 | $0.855 | $3.6 | Source09/07/2026 | |
| Inceptron | Via OpenRouterinceptron/int4 | Lowest listed price: $0.56 | $3.39 | Source09/07/2026 | |
| Moonshot AI | Via OpenRoutermoonshotai/int4 | $0.95 | $4 | Source09/07/2026 | |
| Novita | Via OpenRouternovita | $0.8 | $3.4 | Source09/07/2026 | |
| Parasail | Via OpenRouterparasail/int4 | $0.75 | $3.5 | Source09/07/2026 | |
| Phala | Via OpenRouterphala | $1.09 | $4.6 | Source09/07/2026 | |
| SiliconFlow | Via OpenRoutersiliconflow/fp8 | $0.77 | $3.4 | Source09/07/2026 | |
| StreamLake | Via OpenRouterstreamlake/fp8 | $0.5985 | $2.52 | Source09/07/2026 | |
| Venice | Via OpenRoutervenice/int4 | $0.75 | $3.5 | Source09/07/2026 | |
| Mistral Medium 3.5 | Mistral AI | Direct from developerStandard API | Lowest listed price: $1.5 | Lowest listed price: $7.5 | Source07/30/2026 |
| Mistral | Via OpenRoutermistral | Lowest listed price: $1.5 | Lowest listed price: $7.5 | Source09/07/2026 | |
| Mistral | Via OpenRoutermistral/eu | $1.65 | $8.25 | Source09/07/2026 | |
| Mistral | Via OpenRoutermistral/zdr | Lowest listed price: $1.5 | Lowest listed price: $7.5 | 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.
Kimi K2.6
Mistral Medium 3.5
Coding: 100 / 97.7 (1 benchmark family)
Reasoning: 100 / 97.1 (1 benchmark family)
Mathematics: 100 / 96.9 (1 benchmark family)
Knowledge: 100 / 97 (1 benchmark family)
Finance: 100 / 98.3 (1 benchmark family)
Legal: 100 / 98.4 (1 benchmark family)
Health: 100 / 96.8 (1 benchmark family)
General: 100 / 97.4 (1 benchmark family)
28 matched rows from 1 benchmark families were considered. The radar shows 8 of 8 comparable categories.
Kimi K2.6Mistral Medium 3.5
LMArena Text, Style ControlOverall. Higher is better. No documented setup difference
Kimi K2.6Winner1,460.613
Mistral Medium 3.51,426.98
LMArena Text, Style ControlBusiness, management and finance. Higher is better. No documented setup difference
Kimi K2.6Winner1,455.777
Mistral Medium 3.51,431.113
LMArena Text, Style ControlChinese. Higher is better. No documented setup difference
Kimi K2.6Winner1,526.043
Mistral Medium 3.51,448.299
LMArena Text, Style ControlCoding. Higher is better. No documented setup difference
Kimi K2.6Winner1,514.216
Mistral Medium 3.51,478.845
LMArena Text, Style ControlCreative writing. Higher is better. No documented setup difference
Kimi K2.6Winner1,430.943
Mistral Medium 3.51,396.971
LMArena Text, Style ControlEnglish. Higher is better. No documented setup difference
Kimi K2.6Winner1,467.466
Mistral Medium 3.51,444.656
LMArena Text, Style ControlEntertainment, sports and media. Higher is better. No documented setup difference
Kimi K2.6Winner1,427.512
Mistral Medium 3.51,396.875
LMArena Text, Style ControlExcluding ties. Higher is better. No documented setup difference
Kimi K2.6Winner1,464.238
Mistral Medium 3.51,421.17
LMArena Text, Style ControlExpert prompts. Higher is better. No documented setup difference
Kimi K2.6Winner1,501.44
Mistral Medium 3.51,438.278
LMArena Text, Style ControlFrench. Higher is better. No documented setup difference
Kimi K2.6No clear lead1,473.951
Mistral Medium 3.51,436.08
LMArena Text, Style ControlGerman. Higher is better. No documented setup difference
Kimi K2.6No clear lead1,458.134
Mistral Medium 3.51,442.607
LMArena Text, Style ControlHard prompts. Higher is better. No documented setup difference
Kimi K2.6Winner1,484.733
Mistral Medium 3.51,445.592
Key to the marks:better valuebetter, but not conclusivetie
| Benchmark and task | Kimi K2.6 | Mistral Medium 3.5 | Source |
|---|---|---|---|
LMArena Text, Style ControlOverallTest detailsNo documented difference in the test setupVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterKimi K2.6: Snapshot: kimi-k2.6, Harness: Arena text, style control Mistral Medium 3.5: Snapshot: mistral-medium-3.5, Harness: Arena text, style controlKimi K2.6: Style-controlled Arena rating from 37,573 anonymous pairwise votes.Mistral Medium 3.5: Style-controlled Arena rating from 11,017 anonymous pairwise votes. | Winner1,460.613 95% confidence interval: ±4.534The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | 1,426.98 95% confidence interval: ±6.556The 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 betterKimi K2.6: Snapshot: kimi-k2.6, Harness: Arena text, style control Mistral Medium 3.5: Snapshot: mistral-medium-3.5, Harness: Arena text, style controlKimi K2.6: Style-controlled Arena rating from 7,489 anonymous pairwise votes.Mistral Medium 3.5: Style-controlled Arena rating from 2,148 anonymous pairwise votes. | Winner1,455.777 95% confidence interval: ±7.725The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | 1,431.113 95% confidence interval: ±13.17The 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 betterKimi K2.6: Snapshot: kimi-k2.6, Harness: Arena text, style control Mistral Medium 3.5: Snapshot: mistral-medium-3.5, Harness: Arena text, style controlKimi K2.6: Style-controlled Arena rating from 1,900 anonymous pairwise votes.Mistral Medium 3.5: Style-controlled Arena rating from 500 anonymous pairwise votes. | Winner1,526.043 95% confidence interval: ±14.272The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | 1,448.299 95% confidence interval: ±26.61The 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 betterKimi K2.6: Snapshot: kimi-k2.6, Harness: Arena text, style control Mistral Medium 3.5: Snapshot: mistral-medium-3.5, Harness: Arena text, style controlKimi K2.6: Style-controlled Arena rating from 10,419 anonymous pairwise votes.Mistral Medium 3.5: Style-controlled Arena rating from 3,079 anonymous pairwise votes. | Winner1,514.216 95% confidence interval: ±7.05The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | 1,478.845 95% confidence interval: ±11.157The 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 betterKimi K2.6: Snapshot: kimi-k2.6, Harness: Arena text, style control Mistral Medium 3.5: Snapshot: mistral-medium-3.5, Harness: Arena text, style controlKimi K2.6: Style-controlled Arena rating from 5,846 anonymous pairwise votes.Mistral Medium 3.5: Style-controlled Arena rating from 1,862 anonymous pairwise votes. | Winner1,430.943 95% confidence interval: ±8.493The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | 1,396.971 95% confidence interval: ±14.389The 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 betterKimi K2.6: Snapshot: kimi-k2.6, Harness: Arena text, style control Mistral Medium 3.5: Snapshot: mistral-medium-3.5, Harness: Arena text, style controlKimi K2.6: Style-controlled Arena rating from 17,189 anonymous pairwise votes.Mistral Medium 3.5: Style-controlled Arena rating from 5,299 anonymous pairwise votes. | Winner1,467.466 95% confidence interval: ±5.735The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | 1,444.656 95% confidence interval: ±8.682The 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 betterKimi K2.6: Snapshot: kimi-k2.6, Harness: Arena text, style control Mistral Medium 3.5: Snapshot: mistral-medium-3.5, Harness: Arena text, style controlKimi K2.6: Style-controlled Arena rating from 7,644 anonymous pairwise votes.Mistral Medium 3.5: Style-controlled Arena rating from 2,453 anonymous pairwise votes. | Winner1,427.512 95% confidence interval: ±7.76The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | 1,396.875 95% confidence interval: ±12.491The 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 betterKimi K2.6: Snapshot: kimi-k2.6, Harness: Arena text, style control Mistral Medium 3.5: Snapshot: mistral-medium-3.5, Harness: Arena text, style controlKimi K2.6: Style-controlled Arena rating from 27,810 anonymous pairwise votes.Mistral Medium 3.5: Style-controlled Arena rating from 8,299 anonymous pairwise votes. | Winner1,464.238 95% confidence interval: ±5.929The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | 1,421.17 95% confidence interval: ±8.686The 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 betterKimi K2.6: Snapshot: kimi-k2.6, Harness: Arena text, style control Mistral Medium 3.5: Snapshot: mistral-medium-3.5, Harness: Arena text, style controlKimi K2.6: Style-controlled Arena rating from 3,516 anonymous pairwise votes.Mistral Medium 3.5: Style-controlled Arena rating from 1,110 anonymous pairwise votes. | Winner1,501.44 95% confidence interval: ±10.353The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | 1,438.278 95% confidence interval: ±17.831The 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 setupNo clear leadVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterKimi K2.6: Snapshot: kimi-k2.6, Harness: Arena text, style control Mistral Medium 3.5: Snapshot: mistral-medium-3.5, Harness: Arena text, style controlKimi K2.6: Style-controlled Arena rating from 1,500 anonymous pairwise votes.Mistral Medium 3.5: Style-controlled Arena rating from 438 anonymous pairwise votes. | No clear lead1,473.951 95% confidence interval: ±17.102The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | 1,436.08 95% confidence interval: ±30.551The 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 betterKimi K2.6: Snapshot: kimi-k2.6, Harness: Arena text, style control Mistral Medium 3.5: Snapshot: mistral-medium-3.5, Harness: Arena text, style controlKimi K2.6: Style-controlled Arena rating from 734 anonymous pairwise votes.Mistral Medium 3.5: Style-controlled Arena rating from 170 anonymous pairwise votes. | No clear lead1,458.134 95% confidence interval: ±21.649The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | 1,442.607 95% confidence interval: ±44.317The 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 betterKimi K2.6: Snapshot: kimi-k2.6, Harness: Arena text, style control Mistral Medium 3.5: Snapshot: mistral-medium-3.5, Harness: Arena text, style controlKimi K2.6: Style-controlled Arena rating from 24,328 anonymous pairwise votes.Mistral Medium 3.5: Style-controlled Arena rating from 7,154 anonymous pairwise votes. | Winner1,484.733 95% confidence interval: ±5.291The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | 1,445.592 95% confidence interval: ±7.857The 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 betterKimi K2.6: Snapshot: kimi-k2.6, Harness: Arena text, style control Mistral Medium 3.5: Snapshot: mistral-medium-3.5, Harness: Arena text, style controlKimi K2.6: Style-controlled Arena rating from 11,753 anonymous pairwise votes.Mistral Medium 3.5: Style-controlled Arena rating from 3,629 anonymous pairwise votes. | Winner1,486.948 95% confidence interval: ±6.669The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | 1,458.246 95% confidence interval: ±10.39The 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 betterKimi K2.6: Snapshot: kimi-k2.6, Harness: Arena text, style control Mistral Medium 3.5: Snapshot: mistral-medium-3.5, Harness: Arena text, style controlKimi K2.6: Style-controlled Arena rating from 12,232 anonymous pairwise votes.Mistral Medium 3.5: Style-controlled Arena rating from 3,561 anonymous pairwise votes. | Winner1,453.473 95% confidence interval: ±6.475The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | 1,422.491 95% confidence interval: ±10.335The 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 betterKimi K2.6: Snapshot: kimi-k2.6, Harness: Arena text, style control Mistral Medium 3.5: Snapshot: mistral-medium-3.5, Harness: Arena text, style controlKimi K2.6: Style-controlled Arena rating from 712 anonymous pairwise votes.Mistral Medium 3.5: Style-controlled Arena rating from 178 anonymous pairwise votes. | No clear lead1,421.63 95% confidence interval: ±23.119The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | 1,394.42 95% confidence interval: ±44.572The 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 setupNo clear leadVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterKimi K2.6: Snapshot: kimi-k2.6, Harness: Arena text, style control Mistral Medium 3.5: Snapshot: mistral-medium-3.5, Harness: Arena text, style controlKimi K2.6: Style-controlled Arena rating from 2,841 anonymous pairwise votes.Mistral Medium 3.5: Style-controlled Arena rating from 839 anonymous pairwise votes. | No clear lead1,460.627 95% confidence interval: ±11.45The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | 1,437.785 95% confidence interval: ±21.302The 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 betterKimi K2.6: Snapshot: kimi-k2.6, Harness: Arena text, style control Mistral Medium 3.5: Snapshot: mistral-medium-3.5, Harness: Arena text, style controlKimi K2.6: Style-controlled Arena rating from 6,229 anonymous pairwise votes.Mistral Medium 3.5: Style-controlled Arena rating from 1,823 anonymous pairwise votes. | Winner1,476.941 95% confidence interval: ±8.13The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | 1,433.494 95% confidence interval: ±14.359The 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 betterKimi K2.6: Snapshot: kimi-k2.6, Harness: Arena text, style control Mistral Medium 3.5: Snapshot: mistral-medium-3.5, Harness: Arena text, style controlKimi K2.6: Style-controlled Arena rating from 15,575 anonymous pairwise votes.Mistral Medium 3.5: Style-controlled Arena rating from 4,661 anonymous pairwise votes. | Winner1,475.676 95% confidence interval: ±6.237The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | 1,430.723 95% confidence interval: ±9.428The 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 betterKimi K2.6: Snapshot: kimi-k2.6, Harness: Arena text, style control Mistral Medium 3.5: Snapshot: mistral-medium-3.5, Harness: Arena text, style controlKimi K2.6: Style-controlled Arena rating from 1,936 anonymous pairwise votes.Mistral Medium 3.5: Style-controlled Arena rating from 539 anonymous pairwise votes. | Winner1,478.292 95% confidence interval: ±13.492The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | 1,429.582 95% confidence interval: ±24.872The 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 betterKimi K2.6: Snapshot: kimi-k2.6, Harness: Arena text, style control Mistral Medium 3.5: Snapshot: mistral-medium-3.5, Harness: Arena text, style controlKimi K2.6: Style-controlled Arena rating from 2,051 anonymous pairwise votes.Mistral Medium 3.5: Style-controlled Arena rating from 597 anonymous pairwise votes. | Winner1,484.174 95% confidence interval: ±13.331The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | 1,442.192 95% confidence interval: ±23.932The 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 betterKimi K2.6: Snapshot: kimi-k2.6, Harness: Arena text, style control Mistral Medium 3.5: Snapshot: mistral-medium-3.5, Harness: Arena text, style controlKimi K2.6: Style-controlled Arena rating from 2,701 anonymous pairwise votes.Mistral Medium 3.5: Style-controlled Arena rating from 802 anonymous pairwise votes. | Winner1,469.999 95% confidence interval: ±11.959The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | 1,423.47 95% confidence interval: ±21.791The 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 betterKimi K2.6: Snapshot: kimi-k2.6, Harness: Arena text, style control Mistral Medium 3.5: Snapshot: mistral-medium-3.5, Harness: Arena text, style controlKimi K2.6: Style-controlled Arena rating from 6,558 anonymous pairwise votes.Mistral Medium 3.5: Style-controlled Arena rating from 1,803 anonymous pairwise votes. | Winner1,459.745 95% confidence interval: ±8.178The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | 1,431.302 95% confidence interval: ±14.433The 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 betterKimi K2.6: Snapshot: kimi-k2.6, Harness: Arena text, style control Mistral Medium 3.5: Snapshot: mistral-medium-3.5, Harness: Arena text, style controlKimi K2.6: Style-controlled Arena rating from 20,384 anonymous pairwise votes.Mistral Medium 3.5: Style-controlled Arena rating from 5,718 anonymous pairwise votes. | Winner1,449.236 95% confidence interval: ±5.442The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | 1,406.687 95% confidence interval: ±8.36The 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 betterKimi K2.6: Snapshot: kimi-k2.6, Harness: Arena text, style control Mistral Medium 3.5: Snapshot: mistral-medium-3.5, Harness: Arena text, style controlKimi K2.6: Style-controlled Arena rating from 741 anonymous pairwise votes.Mistral Medium 3.5: Style-controlled Arena rating from 226 anonymous pairwise votes. | No clear lead1,445.318 95% confidence interval: ±21.349The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | 1,407.955 95% confidence interval: ±38.858The 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 betterKimi K2.6: Snapshot: kimi-k2.6, Harness: Arena text, style control Mistral Medium 3.5: Snapshot: mistral-medium-3.5, Harness: Arena text, style controlKimi K2.6: Style-controlled Arena rating from 3,817 anonymous pairwise votes.Mistral Medium 3.5: Style-controlled Arena rating from 1,143 anonymous pairwise votes. | Winner1,453.006 95% confidence interval: ±9.898The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | 1,415.692 95% confidence interval: ±17.832The 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 betterKimi K2.6: Snapshot: kimi-k2.6, Harness: Arena text, style control Mistral Medium 3.5: Snapshot: mistral-medium-3.5, Harness: Arena text, style controlKimi K2.6: Style-controlled Arena rating from 15,076 anonymous pairwise votes.Mistral Medium 3.5: Style-controlled Arena rating from 4,320 anonymous pairwise votes. | Winner1,503.051 95% confidence interval: ±6.107The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | 1,470.76 95% confidence interval: ±9.541The 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 setupVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterKimi K2.6: Snapshot: kimi-k2.6, Harness: Arena text, style control Mistral Medium 3.5: Snapshot: mistral-medium-3.5, Harness: Arena text, style controlKimi K2.6: Style-controlled Arena rating from 1,322 anonymous pairwise votes.Mistral Medium 3.5: Style-controlled Arena rating from 377 anonymous pairwise votes. | Winner1,457.814 95% confidence interval: ±17.141The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | 1,386.845 95% confidence interval: ±32.418The 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 betterKimi K2.6: Snapshot: kimi-k2.6, Harness: Arena text, style control Mistral Medium 3.5: Snapshot: mistral-medium-3.5, Harness: Arena text, style controlKimi K2.6: Style-controlled Arena rating from 8,865 anonymous pairwise votes.Mistral Medium 3.5: Style-controlled Arena rating from 2,734 anonymous pairwise votes. | Winner1,438.306 95% confidence interval: ±7.246The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | 1,405.944 95% confidence interval: ±11.74The 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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