Mistral: Devstral Small 2
Devstral Small 2 is a language model from Mistral released on Dec 9, 2025. It reads text and images and writes text, with a 256K token context window and up to 131K tokens per reply.
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It costs $0.10 per million input tokens and $0.30 per million output tokens. Cached input bills at $0.10, 0% less than fresh input.
It supports tool calling and prompt caching, and its weights are open, so you can host it yourself.
- Modalities
- In / out price
- $0.10 / $0.30 per 1M
- Context
- 256K
- Max output
- 131K
- Released
- Dec 9, 2025
- Knowledge cutoff
- Dec 2025
- Tool calling
- Structured output
- Reasoning
- Prompt caching
- Open weights
- Free to use
Devstral Small 2 pricing
USD, as listed on Oct 15, 2026. Most bills are input heavy, so the cached input rate matters as much as the headline price.
| Input | $0.10 / 1M tokens | |
|---|---|---|
| Output | $0.30 / 1M tokens | |
| Cached input (read) | $0.10 / 1M tokens | 0% off input |
| Cache write | $0.10 / 1M tokens |
What Devstral Small 2 costs per month
Pick a workload close to yours or type your own volumes.
Supported request parameters
What you can set when you call Devstral Small 2 through an OpenAI compatible API.
- Tools
tools - Temperature
temperature
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Devstral Small 2 questions
How much does the Devstral Small 2 API cost?
$0.10 per million input tokens and $0.30 per million output tokens, with cached input at $0.10. The estimator on this page turns that into a monthly bill for your own workload.
What is the context window of Devstral Small 2?
256,000 tokens of input, and it can write up to 131,072 tokens in one reply. As a rough guide, a million tokens is around 750,000 English words.
Does Devstral Small 2 support tool calling?
Yes. It accepts tool definitions, which is what an agent needs to call your APIs.
Is Devstral Small 2 open source?
Its weights are published, so you can run it on your own hardware or a cloud of your choice. Read the license before commercial use.
When was Devstral Small 2 released?
Dec 9, 2025, with training data up to Dec 2025.
Catalog data from models.dev (MIT licensed), refreshed daily, last on Oct 15, 2026. The summary is written from these facts.
Building on Devstral Small 2?
I test your real tasks on it and the two closest alternatives, then ship the agent on whichever wins on cost and accuracy.
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