Mistral Small vs Kimi K2
Mistral Mistral Small | Moonshot AI Kimi K2 | |
|---|---|---|
| Overview | ||
| Company | Mistral | Moonshot AI |
| Release date | Feb 26 2024 | Jul 11 2025 |
| Access | Proprietary | 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 shipped 501 days before Kimi K2 | |
Which is better: Mistral Small or Kimi K2?
Mistral Small and Kimi K2 don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. Mistral Small shipped 501 days before Kimi K2, so benchmark comparisons should account for the intervening progress.
Mistral Small is proprietary, while Kimi K2 is open weight.
Direct benchmark comparisons are unavailable — Mistral Small and Kimi K2 don't publish scores on any of the same benchmarks.
Frequently asked questions
Mistral Small was released by Mistral on Feb 26 2024.
Kimi K2 was released by Moonshot AI on Jul 11 2025.
Mistral Small is a proprietary model released by Mistral. Kimi K2 is an open weight model released by Moonshot AI.
Other comparisons
Mistral Small vs Claude Sonnet 5Kimi K2 vs Claude Sonnet 5Mistral Small vs GPT-5.6 SolKimi K2 vs GPT-5.6 SolMistral Small vs Gemini OmniKimi K2 vs Gemini OmniMistral Small vs Muse Spark 1.1Kimi K2 vs Muse Spark 1.1Mistral Small vs Grok 4.5Kimi K2 vs Grok 4.5Mistral Small vs DeepSeek-V4-ProKimi K2 vs DeepSeek-V4-Pro