Codestral 25.01 vs Kimi K2.5
Mistral Codestral 25.01 | Moonshot AI Kimi K2.5 | |
|---|---|---|
| Overview | ||
| Company | Mistral | Moonshot AI |
| Release date | Jan 13 2025 | Jan 27 2026 |
| Access | Proprietary | Open Weight |
| Specifications | ||
Parameters | — | 1T |
Context window | 256k | 256k |
| 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. | — | 52% |
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. | — | 76.8% |
Agentic coding CursorBench v3.1Cursor's own test of harder, real-world coding tasks inside a code editor. Higher is better. | — | 31.9% |
Next.js coding Next.js EvalsVercel's open eval of how well AI coding agents build and migrate real Next.js apps — measured as the share of tasks the agent completes successfully. Higher is better. | — | 21% |
Competitive coding LiveCodeBenchCoding problems published so recently the AI can't have seen them in training — a contamination-free test of raw programming skill. Higher is better. | — | 85% |
Science GPQA DiamondGraduate-level science questions in biology, physics, and chemistry — hard enough that subject-matter PhDs score around 65%. Higher is better. | — | 87.6% |
| Timeline | ||
| Release gap | Codestral 25.01 shipped 379 days before Kimi K2.5 | |
Which is better: Codestral 25.01 or Kimi K2.5?
Codestral 25.01 and Kimi K2.5 don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. Codestral 25.01 shipped 379 days before Kimi K2.5, so benchmark comparisons should account for the intervening progress.
Context windows are 256k (Codestral 25.01) vs 256k (Kimi K2.5). Codestral 25.01 is proprietary, while Kimi K2.5 is open weight.
Direct benchmark comparisons are unavailable — Codestral 25.01 and Kimi K2.5 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 K2.5 was released by Moonshot AI on Jan 27 2026.
Codestral 25.01 has a 256k context window; Kimi K2.5 has 256k.
Codestral 25.01 is a proprietary model released by Mistral. Kimi K2.5 is an open weight model released by Moonshot AI.