Mistral Small 3.1 vs Kimi K2
Mistral Mistral Small 3.1 | Moonshot AI Kimi K2 | |
|---|---|---|
| Overview | ||
| Company | Mistral | Moonshot AI |
| Release date | Mar 17 2025 | Jul 11 2025 |
| Access | Open Weight | Open Weight |
| Specifications | ||
Parameters | — | 1T |
Context window | — | 128k |
| Benchmarks | ||
Nonsense detection BullshitBench v2Given a confidently-worded but nonsensical prompt, does the AI spot that it makes no sense and push back — instead of playing along and inventing an answer? The score is how often it clearly called out the nonsense. Higher is better. | — | 10% |
Coding SWE-Bench VerifiedReal coding tasks pulled from open-source projects — the AI has to find and fix actual bugs. A human-checked version of the original SWE-Bench. Higher is better. | — | 65.8% |
Science GPQA DiamondGraduate-level science questions in biology, physics, and chemistry — hard enough that subject-matter PhDs score around 65%. Higher is better. | — | 75.1% |
| Timeline | ||
| Release gap | Mistral Small 3.1 shipped 116 days before Kimi K2 | |
Which is better: Mistral Small 3.1 or Kimi K2?
Mistral Small 3.1 and Kimi K2 don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. Mistral Small 3.1 shipped 116 days before Kimi K2, so benchmark comparisons should account for the intervening progress.
Published specifications for these two models are limited — see each model page for the latest details.
Direct benchmark comparisons are unavailable — Mistral Small 3.1 and Kimi K2 don't publish scores on any of the same benchmarks.
Frequently asked questions
Mistral Small 3.1 was released by Mistral on Mar 17 2025.
Kimi K2 was released by Moonshot AI on Jul 11 2025.
Other comparisons
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