Mistral Medium 3.5 vs Grok 4 Heavy
Mistral Mistral Medium 3.5 | SpaceXAI Grok 4 Heavy | |
|---|---|---|
| Overview | ||
| Company | Mistral | SpaceXAI |
| Release date | Apr 29 2026 | Jul 9 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 | Grok 4 Heavy shipped 294 days before Mistral Medium 3.5 | |
Which is better: Mistral Medium 3.5 or Grok 4 Heavy?
Mistral Medium 3.5 and Grok 4 Heavy don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. Grok 4 Heavy shipped 294 days before Mistral Medium 3.5, so benchmark comparisons should account for the intervening progress.
Mistral Medium 3.5 is open weight, while Grok 4 Heavy is proprietary.
Direct benchmark comparisons are unavailable — Mistral Medium 3.5 and Grok 4 Heavy 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.
Grok 4 Heavy was released by SpaceXAI on Jul 9 2025.
Mistral Medium 3.5 is an open weight model released by Mistral. Grok 4 Heavy is a proprietary model released by SpaceXAI.
Other comparisons
Mistral Medium 3.5 vs Claude Sonnet 5Grok 4 Heavy vs Claude Sonnet 5Mistral Medium 3.5 vs GPT-5.6 SolGrok 4 Heavy vs GPT-5.6 SolMistral Medium 3.5 vs Gemini OmniGrok 4 Heavy vs Gemini OmniMistral Medium 3.5 vs Muse Spark 1.1Grok 4 Heavy vs Muse Spark 1.1Mistral Medium 3.5 vs DeepSeek-V4-ProGrok 4 Heavy vs DeepSeek-V4-ProMistral Medium 3.5 vs Kimi K2.7 CodeGrok 4 Heavy vs Kimi K2.7 Code