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
Context window
This model accepts 131K tokens in one request (~98K words of text).
What fits in one request
- FitsShort documentAbout 1,500 words of text
- FitsLong documentAbout 37K words of text
- Won't fitSmall codebaseAbout 150K words of text
- Won't fitFull novelAbout 375K words of text
Specifications
Context size, pricing, and release info in one place.
- Context window
- 131,072 tokens (131K)
- Speed tier
- balanced
- Provider
- Mistral
- Release date
- Jul 2025
Capabilities
See which features this model supports, such as vision, tools, and streaming.
- Tool use
- Can call external tools and APIs
- Supported
- Function calling
- Structured function call interface
- Supported
- Streaming
- Returns tokens as they are generated
- Supported
- Prompt caching
- Reuse repeated prompt prefixes cheaply
- Supported
- Vision
- Accepts image inputs alongside text
- Not supported
- Extended thinking
- Shows its chain-of-thought reasoning
- Not supported
- Web search
- Can browse the web during a request
- Not supported
- Batch API
- Process many requests asynchronously
- Not supported
Best for
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Compare Devstral Medium
Open a side-by-side comparison with one click.
- Devstral Medium vs Amazon Titan Text Express
Devstral Medium has 212% larger context window
- Devstral Medium vs Amazon Titan Text Lite
Devstral Medium has 212% larger context window
- Devstral Medium vs Amazon Titan Text Premier
Devstral Medium has 212% larger context window
- Devstral Medium vs Claude Instant
Devstral Medium has 31% larger context window
- Devstral Medium vs Anthropic Claude
Devstral Medium has 31% larger context window
- Devstral Medium vs Codellama 34b Instruct
Devstral Medium has 3100% larger context window
Frequently asked questions
Short answers about context size and how this model behaves.
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