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Mistral: Devstral Medium

mistralai/devstral-medium

Devstral Medium is a high-performance code generation and agentic reasoning model developed jointly by Mistral AI and All Hands AI. Positioned as a step up from Devstral Small, it achieves 61.6% on SWE-Bench Verified, placing it ahead of Gemini 2.5 Pro and GPT-4.1 in code-related tasks, at a fraction of the cost. It is designed for generalization across prompt styles and tool use in code agents and frameworks.

Devstral Medium is available via API only (not open-weight), and supports enterprise deployment on private infrastructure, with optional fine-tuning capabilities.

Modalities
Context
131K
Released
Jul 10, 2025
Knowledge Cutoff
Jun 2025
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Frequently asked questions

Devstral Medium is a high-performance code generation and agentic reasoning model developed jointly by Mistral AI and All Hands AI. Positioned as a step up from Devstral Small, it achieves 61.6% on SWE-Bench Verified, placing it ahead of Gemini 2.5 Pro and GPT-4.1 in code-related tasks, at a fraction of the cost.

Devstral Medium has a 131,072 token context window.

Devstral Medium accepts text and files such as PDFs as input and returns text.

Mistral Large 4, Mistral Medium 3.5, Mistral Small 4 and 17 more are other text models from Mistral AI.

Devstral Medium was released on July 10, 2025. Its knowledge cutoff is June 30, 2025.