Claude 3.5 Sonnet (upgraded) vs Mistral Medium 3.5
Anthropic Claude 3.5 Sonnet (upgraded) | Mistral Mistral Medium 3.5 | |
|---|---|---|
| Overview | ||
| Company | Anthropic | Mistral |
| Release date | Oct 22 2024 | Apr 29 2026 |
| Access | Proprietary | Open Weight |
| Specifications | ||
Parameters | — | 128B |
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. | 49% | 77.6%Best |
| Timeline | ||
| Release gap | Claude 3.5 Sonnet (upgraded) shipped 554 days before Mistral Medium 3.5 | |
Which is better: Claude 3.5 Sonnet (upgraded) or Mistral Medium 3.5?
Mistral Medium 3.5 leads Claude 3.5 Sonnet (upgraded) on 1 of the 1 benchmark they both report (SWE-Bench Verified). Claude 3.5 Sonnet (upgraded) shipped 554 days before Mistral Medium 3.5, so benchmark comparisons should account for the intervening progress.
Claude 3.5 Sonnet (upgraded) is proprietary, while Mistral Medium 3.5 is open weight.
On SWE-Bench Verified, Mistral Medium 3.5 leads at 77.6% vs Claude 3.5 Sonnet (upgraded) at 49%.
Frequently asked questions
Claude 3.5 Sonnet (upgraded) was released by Anthropic on Oct 22 2024.
Mistral Medium 3.5 was released by Mistral on Apr 29 2026.
Mistral Medium 3.5 leads on SWE-Bench Verified — Claude 3.5 Sonnet (upgraded) 49% vs Mistral Medium 3.5 77.6%.
Claude 3.5 Sonnet (upgraded) is a proprietary model released by Anthropic. Mistral Medium 3.5 is an open weight model released by Mistral.