Mistral Medium 3.5vsGrok Code Fast 1
Mistral Medium 3.5 | Grok Code Fast 1 | |
|---|---|---|
| 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% | — |
Community preference (code) Arena Elo (Code)Like the text arena, but people vote on which AI writes better code. The votes become a chess-style Elo rating on arena.ai. Higher is better. | 1267Best | 1163 |
| Overview | ||
| Company | Mistral | SpaceXAI |
| Release date | Apr 29 2026 | Aug 28 2025 |
| Access | Open Weight | Proprietary |
Which is better: Mistral Medium 3.5 or Grok Code Fast 1?
Mistral Medium 3.5 leads Grok Code Fast 1 on 1 of the 1 benchmark they both report (Arena Elo (Code)). Grok Code Fast 1 shipped 244 days before Mistral Medium 3.5, so benchmark comparisons should account for the intervening progress.
Mistral Medium 3.5 is open weight, while Grok Code Fast 1 is proprietary.
On Arena Elo (Code), Mistral Medium 3.5 leads at 1267 vs Grok Code Fast 1 at 1163.
Frequently asked questions
Mistral Medium 3.5 was released by Mistral on Apr 29 2026.
Grok Code Fast 1 was released by SpaceXAI on Aug 28 2025.
Mistral Medium 3.5 is an open weight model released by Mistral. Grok Code Fast 1 is a proprietary model released by SpaceXAI.
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