Codestral 25.01 vs Kimi K2
Mistral Codestral 25.01 | Moonshot AI Kimi K2 | |
|---|---|---|
| Overview | ||
| Company | Mistral | Moonshot AI |
| Release date | Jan 13 2025 | Jul 11 2025 |
| Access | Proprietary | Open Weight |
| Specifications | ||
Parameters | — | 1T |
Context window | 256k | 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 | Codestral 25.01 shipped 179 days before Kimi K2 | |
Which is better: Codestral 25.01 or Kimi K2?
Codestral 25.01 and Kimi K2 don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. Codestral 25.01 shipped 179 days before Kimi K2, so benchmark comparisons should account for the intervening progress.
Context windows are 256k (Codestral 25.01) vs 128k (Kimi K2). Codestral 25.01 is proprietary, while Kimi K2 is open weight.
Direct benchmark comparisons are unavailable — Codestral 25.01 and Kimi K2 don't publish scores on any of the same benchmarks.
Frequently asked questions
Codestral 25.01 was released by Mistral on Jan 13 2025.
Kimi K2 was released by Moonshot AI on Jul 11 2025.
Codestral 25.01 has a 256k context window; Kimi K2 has 128k.
Codestral 25.01 is a proprietary model released by Mistral. Kimi K2 is an open weight model released by Moonshot AI.