Mistral Small 4
Mistral Small 4 is the next major release in the Mistral Small family, unifying the capabilities of several flagship Mistral models into a single system.
Model by Mistral AI
Install
Pick your client. Read the repository before you give any tool access to your data.
{
"model": "mistralai/mistral-small-2603",
"baseURL": "https://openrouter.ai/api/v1"
}OpenAI-compatible API: point any OpenAI SDK at the base URL and use this model id.
Settings it needs
OPENROUTER_API_KEYrequiredsecret
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About
Use cases: model-inference
Reviews
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Price and limits
| Variant | Input $/M tokens | Output $/M tokens | Cached input $/M |
|---|---|---|---|
| Standard | $0.15 | $0.6 | $0.015 |
Batch API mistralai/mistral-small-2603:batch | $0.075 | $0.3 | — |
Price as of Oct 26, 2026 from OpenRouter · provider's own prices: mistral.ai. Prices change often; check before you rely on one.
- Provider
- Mistral
- Model id
mistralai/mistral-small-2603- Context window
- 262,144 tokens (262K)
- Max output
- 209,715 tokens
- Input
- text, image
- Output
- text
- Tool calling
- Yes
- Structured outputs
- Yes
- Reasoning
- Yes
- Weights
- Open: mistralai/Mistral-Small-4-119B-2603
- Released
- Mar 16, 2026
Details
- Auth
- API key
- License
- License unknown
- Website
- mistral.ai
- First seen
- Oct 24, 2026
- Last checked
- Oct 26, 2026
- Source
- OpenRouter
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Cite this page
Mistral Small 4: price, context window, tool use. Agent Mart. https://agentmart.dev/models/mistralai-mistral-small-2603 (last updated 2026-10-26)