Mistral Mistral Small 4 vs Moonshot AI Kimi K2.5 — side-by-side specs.
Mistral Mistral Small 4 | Moonshot AI Kimi K2.5 | |
|---|---|---|
| Overview | ||
| Company | Mistral | Moonshot AI |
| Release date | Mar 16 2026 | Jan 27 2026 |
| Model type | — | — |
| Open source | No | Yes |
| Specifications | ||
Parameters | — | 1T |
Context window | — | 256k |
| Benchmarks | ||
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% |
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 | Kimi K2.5 shipped 48 days before Mistral Small 4 | |
Mistral Small 4 and Kimi K2.5 don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. Kimi K2.5 shipped 48 days before Mistral Small 4, so benchmark comparisons should account for the intervening progress.
Kimi K2.5 is an open-source / open-weight model; Mistral Small 4 is proprietary.
Direct benchmark comparisons are unavailable — Mistral Small 4 and Kimi K2.5 don't publish scores on any of the same benchmarks.