tech
Upgrading agentic coding capabilities with the new Devstral models
Today, we introduce Devstral Medium, as well as an upgrade to Devstral Small. These models are released under the collaboration between Mistral AI and All Hands AI 🙌, with a strong emphasis on generalization to different prompts and agentic scaffolds.
TL;DR
- Devstral Medium and Devstral Small 1.1 are introduced through a collaboration between Mistral AI and All Hands AI.
- Devstral Small 1.1 is released under the Apache 2.0 license and achieves state-of-the-art results for open models on SWE-Bench Verified.
- Devstral Medium offers superior cost/performance compared to Gemini 2.5 Pro and GPT 4.1, available via API and for private deployment.
- Both models emphasize generalization to different prompts and agentic scaffolds.
- Devstral Small 1.1 supports Mistral function calling and XML formats for broader adaptability.
- Devstral Medium can be customized through finetuning for specific enterprise use cases.
- Pricing for Devstral Small 2507 and Devstral Medium 2507 is aligned with existing Mistral API offerings.