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. It combines strong reasoning from Magistral, multimodal understanding from Pixtral, and agentic coding capabilities from Devstral, enabling one model to handle complex analysis, software development, and visual tasks within the same workflow.

ChatMistral262k tokens$0.1635 / $0.654 · 1M

mistralai/mistral-small-2603

Context
262k tokens
Completion cap
—
Tools
Yes
JSON
Yes
Released
2026-03-16

Call it from Geek Hub

Same OpenAI SDK. Change the base URL and the model id.

curl https://api.geekhub.mx/v1/chat/completions \
  -H "Authorization: Bearer $GEEKHUB_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "mistralai/mistral-small-2603",
    "messages": [{"role": "user", "content": "Hola"}]
  }'
Get an API key

Frequently asked questions

What is 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. It combines strong reasoning from Magistral, multimodal understanding from Pixtral, and agentic coding capabilities from Devstral, enabling one model to handle complex analysis, software development, and visual tasks within the same workflow. Mistral Small 4 runs on the Geek Hub API (OpenAI-compatible). Model id: mistralai/mistral-small-2603.
Is Mistral Small 4 free?
No. Input is $0.1635 per 1M tokens and output is $0.654 per 1M tokens on Geek Hub (markup included).
What is the context length of Mistral Small 4?
Mistral Small 4 has a 262k tokens context window.
Does Mistral Small 4 support tool calling and structured outputs?
Mistral Small 4 accepts tools and tool_choice for function calling. It also supports structured outputs via a JSON schema in response_format.
When was Mistral Small 4 released?
Mistral Small 4 was released on 2026-03-16.

More models from Mistral