Composer 1.5 vs Devstral Small
Cursor Composer 1.5 | Mistral Devstral Small | |
|---|---|---|
| Overview | ||
| Company | Cursor | Mistral |
| Release date | Feb 8 2026 | May 21 2025 |
| Access | Proprietary | Open Weight |
| Specifications | ||
Parameters | — | 24B |
| Benchmarks | ||
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. | 67% | — |
| Timeline | ||
| Release gap | Devstral Small shipped 263 days before Composer 1.5 | |
Which is better: Composer 1.5 or Devstral Small?
Composer 1.5 and Devstral Small don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. Devstral Small shipped 263 days before Composer 1.5, so benchmark comparisons should account for the intervening progress.
Composer 1.5 is proprietary, while Devstral Small is open weight.
Direct benchmark comparisons are unavailable — Composer 1.5 and Devstral Small don't publish scores on any of the same benchmarks.
Frequently asked questions
Composer 1.5 was released by Cursor on Feb 8 2026.
Devstral Small was released by Mistral on May 21 2025.
Composer 1.5 is a proprietary model released by Cursor. Devstral Small is an open weight model released by Mistral.
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