Mistral Medium 3.5 vs Grok 4.5
Mistral Mistral Medium 3.5 | SpaceXAI Grok 4.5 | |
|---|---|---|
| Overview | ||
| Company | Mistral | SpaceXAI |
| Release date | Apr 29 2026 | Jul 8 2026 |
| Access | Open Weight | Proprietary |
| Specifications | ||
Parameters | 128B | — |
Context window | 256k | — |
| Benchmarks | ||
Agentic coding SWE-Bench ProCan the AI fix real bugs in real software? It's handed actual problems from open-source projects and has to write code that genuinely solves them. Higher is better. | — | 64.7% |
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% | — |
Multilingual coding SWE-Bench MultilingualLike SWE-Bench, but the coding problems span many programming languages, not just one. Tests how broadly the AI can code. Higher is better. | — | 78% |
Agentic coding DeepSWE 1.0Artificial Analysis' independent test of deep, agentic software-engineering work — the AI has to plan and carry out substantial coding tasks end to end. Higher is better. | — | 62% |
Agentic terminal coding Terminal-Bench 2.1Can the AI work in a command-line terminal — running commands and finishing technical setup tasks the way a developer would? Higher is better. | — | 83.3% |
| Timeline | ||
| Release gap | Mistral Medium 3.5 shipped 70 days before Grok 4.5 | |
Which is better: Mistral Medium 3.5 or Grok 4.5?
Mistral Medium 3.5 and Grok 4.5 don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. Mistral Medium 3.5 shipped 70 days before Grok 4.5, so benchmark comparisons should account for the intervening progress.
Mistral Medium 3.5 is open weight, while Grok 4.5 is proprietary.
Direct benchmark comparisons are unavailable — Mistral Medium 3.5 and Grok 4.5 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 4.5 was released by SpaceXAI on Jul 8 2026.
Mistral Medium 3.5 is an open weight model released by Mistral. Grok 4.5 is a proprietary model released by SpaceXAI.
Other comparisons
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