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Step 5 Preview
Mistral Medium 3.1
Mistral Medium 3.1 is a proprietary model from Mistral AI, released Aug 13, 2025. It ranks #108 of 351 on the LMArena text leaderboard with a rating of 1424. It costs $0.40 per million input tokens and $2 per million output tokens, with a 128K-token context window.
- Developer
- Mistral AI
- Released
- Aug 13, 2025
- Context window
- 128K
- Price in / out, per 1M tokens
- $0.40 / $2
- Weights
- Proprietary
- Inputs
- Text, Images, Files
- Reasoning
- No
- Tool use
- Yes
LMArena, by category
| Leaderboard | Rating | Rank | Votes |
|---|---|---|---|
| TextLMArena | 1424 | 108 / 351 | 95.3K |
| CodingLMArena | 1433 | 133 / 346 | 21.6K |
| MathLMArena | 1408 | 148 / 339 | 6K |
| Creative writingLMArena | 1391 | 116 / 349 | 14K |
| Instruction followingLMArena | 1398 | 136 / 351 | 27.6K |
| Hard promptsLMArena | 1426 | 123 / 351 | 52.9K |
| Multi-turnLMArena | 1418 | 119 / 349 | 16.4K |
| Long queriesLMArena | 1406 | 139 / 330 | 27.8K |
| ExpertLMArena | 1408 | 146 / 305 | 6.6K |
| Legal and governmentIndustries | 1439 | 88 / 325 | 6.7K |
| Medicine and healthcareIndustries | 1449 | 75 / 325 | 6K |
| Business and financeIndustries | 1418 | 105 / 344 | 17.9K |
| ChineseLanguages | 1447 | 130 / 328 | 7.2K |
| SpanishLanguages | 1433 | 96 / 249 | 2.9K |
| GermanLanguages | 1432 | 81 / 261 | 1.7K |
| FrenchLanguages | 1460 | 66 / 252 | 2.1K |
| JapaneseLanguages | 1379 | 99 / 236 | 1.1K |
| VisionLMArena | 1172 | 109 / 146 | 41.6K |
LMArena, CC BY 4.0, as of Oct 22, 2026. Where a model is rated at several effort levels, its best is shown.
Compare Mistral Medium 3.1
Mistral AI
Europe’s leading model lab, with efficient open and commercial models and EU hosting. Founded 2023, based in Paris. mistral.ai
Questions
Who makes Mistral Medium 3.1?
Mistral Medium 3.1 is made by Mistral AI, founded 2023 and based in Paris.
How much does Mistral Medium 3.1 cost?
$0.40 per million input tokens and $2 per million output tokens, at its provider’s list price.
What is Mistral Medium 3.1’s context window?
128K tokens (131,072).
How does Mistral Medium 3.1 rank?
#108 of 351 on LMArena’s text leaderboard, rated 1424 (95% interval 1422–1427) from 95,285 votes, as of Oct 22, 2026.
Is Mistral Medium 3.1 open source?
No. Mistral Medium 3.1 is proprietary and served through its provider’s API.