Devstral Medium and Devstral Small 1.1
Devstral Medium (API) scores 61.6% and Devstral Small 1.1 (open) 53.6% on SWE-Bench Verified.
Adds a closed Medium tier above the open 24B. Mistral says Medium beats Gemini 2.5 Pro and GPT-4.1 at a quarter of the cost; Small 1.1 is a new open state of the art at its size.
- Date
- Thursday, 10 July 2025
- Lab
- Mistral AI
- Kind
- model
- Access
- closed API
- Price
- Medium $0.40/$2; Small $0.10/$0.30 per 1M tokens, Jul 2025
Figures
| Measure | Value | Measured by |
|---|---|---|
| SWE-Bench Verified (Medium) | 61.6% | company |
| SWE-Bench Verified (Small 1.1) | 53.6% | company |
Small 1.1 is Apache 2.0 open weights; Medium is API only.
Sources
This record was checked against its sources on 6 October 2026. How we check