Cursor Composer 2 vs Mistral Devstral 2 (123B) — side-by-side specs.
Cursor Composer 2 | Mistral Devstral 2 (123B) | |
|---|---|---|
| Overview | ||
| Company | Cursor | Mistral |
| Release date | Mar 20 2026 | Dec 9 2025 |
| Model type | — | — |
| Open source | No | Yes |
| Specifications | ||
Parameters | — | — |
Context window | — | — |
| Benchmarks | ||
Science reasoning GPQA Diamond | — | — |
Software engineering SWE-Bench Verified | — | — |
Multimodal understanding MMMU | — | — |
| Timeline | ||
| Release gap | Devstral 2 (123B) shipped 101 days before Composer 2 | |
Composer 2 and Devstral 2 (123B) do not have directly comparable benchmark scores published on GPQA Diamond, SWE-Bench Verified, or MMMU. Devstral 2 (123B) shipped 101 days before Composer 2, so benchmark comparisons should account for the intervening progress.
Devstral 2 (123B) is an open-source / open-weight model; Composer 2 is proprietary.
Direct benchmark comparisons are unavailable — at least one of these models has not published scores on GPQA Diamond, SWE-Bench Verified, or MMMU.