Devstral Medium 1.0
API ID devstral-medium-2507
Devstral Medium 1.0 was a Mistral model, released July 2025. It had a 128,000-token context window. It took PDF input and supported function calling and structured outputs.
An enterprise grade text model, that excels at using tools to explore codebases, editing multiple files and power software engineering agents.
- Status
- Retired
- Released
- July 2025
- Shutdown
- May 31, 2026
- Replacement
- Mistral Medium 3.5mistral-medium-3-5
devstral-medium-2507 stopped serving on May 31, 2026. Recommended replacement: mistral-medium-3-5.
How to migrate to Mistral Medium 3.5
Benchmarks
Scores as each source published themNo comparison. Pick a model to see the difference on each benchmark.
Arena
| Arena | Devstral Medium 1.0 | Rank | Date | Source |
|---|---|---|---|---|
| WebDev | 1071 ±31 | 142 of 142 842 votes | Oct 13, 2026 | source |
Rated as devstral-medium-2507. Ratings come from people voting between two anonymous answers. Data: Arena (arena.ai), CC BY 4.0.
Features
Compare models| Feature | Value | Since | Source |
|---|---|---|---|
| Structured outputsThe model can be held to a JSON schema you supply, so every reply parses without retries or cleanup. | Supported | in place when tracking began (October 6, 2026) | source |
| Function callingAlso called tool use. You describe functions; the model replies with a function name and arguments for your code to run, then uses the result. | Supported | in place when tracking began (October 6, 2026) | source |
| Batch APISend many requests as one job that runs in the background, usually finished within 24 hours, at a lower price than live requests. | Supported | in place when tracking began (October 6, 2026) | source |
| PDF inputPDF files can go in the prompt directly, without converting them to text first. | Supported | in place when tracking began (October 6, 2026) | source |
| Context windowThe most the model can work with in one request, in tokens: your prompt, conversation history and files. A token is about three-quarters of an English word. | 128,000 tokens | in place when tracking began (October 6, 2026) | source |
Not published by Mistral: Prompt caching, Image input, Reasoning / thinking, Fine-tuning, Built-in web search, temperature parameter, top_p parameter, logprobs, Max output tokens.
Price history
USD per 1M tokens, standard tierWe started recording this model's prices on Oct 5, 2026. The history grows with each daily check.
Show as a table
| From | Type | Price |
|---|---|---|
| Oct 5, 2026 | Input | $0.40 |
| Oct 5, 2026 | Output | $2.00 |
Prices
USD per 1M tokens, every type and band, by tier| Type | Price $/1M | In effect |
|---|---|---|
| Standard | ||
| input | $0.40 | |
| output | $2.00 | |
Changelog
Changes we detected on Mistral's pagesNo changes recorded yet.
Last checked · Sources: Mistral models