2 vs 0 benchmarks won
Anthropic Claude Sonnet 4.6 | Mistral Mistral Medium 3.5 | |
|---|---|---|
| Overview | ||
| Company | Anthropic | Mistral |
| Release date | Feb 17 2026 | Apr 29 2026 |
| Model type | — | — |
| Open source | No | Yes |
| Specifications | ||
Parameters | — | 128B |
Context window | — | 256k |
| Benchmarks | ||
Science reasoning GPQA Diamond | 89.9% | — |
Software engineering SWE-Bench Verified | 79.6% | 77.6% |
Multimodal understanding MMMU | — | — |
| Timeline | ||
| Release gap | Claude Sonnet 4.6 shipped 71 days before Mistral Medium 3.5 | |
Claude Sonnet 4.6 leads Mistral Medium 3.5 on 2 of the tracked benchmarks (GPQA Diamond, SWE-Bench Verified, MMMU). Claude Sonnet 4.6 shipped 71 days before Mistral Medium 3.5, so benchmark comparisons should account for the intervening progress.
Mistral Medium 3.5 is an open-source / open-weight model; Claude Sonnet 4.6 is proprietary.
On SWE-Bench Verified, Claude Sonnet 4.6 scores 79.6%, 2 points above Mistral Medium 3.5 at 77.6%.