Mistral Medium 3.5 vs GPT-5 nano
Mistral Mistral Medium 3.5 | OpenAI GPT-5 nano | |
|---|---|---|
| Overview | ||
| Company | Mistral | OpenAI |
| Release date | Apr 29 2026 | Aug 7 2025 |
| Access | Open Weight | Proprietary |
| 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. | 77.6% | — |
| Timeline | ||
| Release gap | GPT-5 nano shipped 265 days before Mistral Medium 3.5 | |
Which is better: Mistral Medium 3.5 or GPT-5 nano?
Mistral Medium 3.5 and GPT-5 nano don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. GPT-5 nano shipped 265 days before Mistral Medium 3.5, so benchmark comparisons should account for the intervening progress.
Mistral Medium 3.5 is open weight, while GPT-5 nano is proprietary.
Direct benchmark comparisons are unavailable — Mistral Medium 3.5 and GPT-5 nano don't publish scores on any of the same benchmarks.
Frequently asked questions
Mistral Medium 3.5 was released by Mistral on Apr 29 2026.
GPT-5 nano was released by OpenAI on Aug 7 2025.
Mistral Medium 3.5 is an open weight model released by Mistral. GPT-5 nano is a proprietary model released by OpenAI.
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