Composer 2.5 vs Mistral Medium 3.5
Cursor Composer 2.5 | Mistral Mistral Medium 3.5 | |
|---|---|---|
| Overview | ||
| Company | Cursor | Mistral |
| Release date | May 18 2026 | Apr 29 2026 |
| Access | Proprietary | Open Weight |
| 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. | 54% | — |
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. | 79.8% | — |
Agentic coding CursorBench v3.1Cursor's own test of harder, real-world coding tasks inside a code editor. Higher is better. | 63.2% | — |
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. | 18% | — |
Next.js coding Next.js EvalsVercel's open eval of how well AI coding agents build and migrate real Next.js apps — measured as the share of tasks the agent completes successfully. Higher is better. | 92% | — |
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. | 73% | — |
Agentic terminal coding Terminal-Bench 2.0Can the AI work in a command-line terminal — running commands and finishing technical setup tasks the way a developer would? (Version 2.0 of the test.) Higher is better. | 69.3% | — |
| Timeline | ||
| Release gap | Mistral Medium 3.5 shipped 19 days before Composer 2.5 | |
Which is better: Composer 2.5 or Mistral Medium 3.5?
Composer 2.5 and Mistral Medium 3.5 don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. Mistral Medium 3.5 shipped 19 days before Composer 2.5, so benchmark comparisons should account for the intervening progress.
Composer 2.5 is proprietary, while Mistral Medium 3.5 is open weight.
Direct benchmark comparisons are unavailable — Composer 2.5 and Mistral Medium 3.5 don't publish scores on any of the same benchmarks.
Frequently asked questions
Composer 2.5 was released by Cursor on May 18 2026.
Mistral Medium 3.5 was released by Mistral on Apr 29 2026.
Composer 2.5 is a proprietary model released by Cursor. Mistral Medium 3.5 is an open weight model released by Mistral.
Other comparisons
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