Mistral Medium 3.5 (batch)

Mistral Medium 3.5 is a dense 128B instruction-following model from Mistral AI. It supports text and image inputs with text output, and is designed for agentic workflows, coding, and complex multi-step reasoning. It is particularly strong at reliable multi-tool calling and long-horizon tasks, with a 256K context window, configurable reasoning effort per request, and a custom vision encoder that handles variable image sizes and aspect ratios. Self-hostable on as few as four GPUs and available under open weights.

ChatMistral262k tokens$0.8175 / $4.0877 · 1M

mistralai/mistral-medium-3-5:batch

Context
262k tokens
Completion cap
209,715
Tools
Yes
JSON
Yes
Released
2026-04-30

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-medium-3-5:batch",
    "messages": [{"role": "user", "content": "Hola"}]
  }'
Get an API key

Frequently asked questions

What is Mistral Medium 3.5 (batch)?
Mistral Medium 3.5 is a dense 128B instruction-following model from Mistral AI. It supports text and image inputs with text output, and is designed for agentic workflows, coding, and complex multi-step reasoning. It is particularly strong at reliable multi-tool calling and long-horizon tasks, with a 256K context window, configurable reasoning effort per request, and a custom vision encoder that handles variable image sizes and aspect ratios. Self-hostable on as few as four GPUs and available under open weights. Mistral Medium 3.5 (batch) runs on the Geek Hub API (OpenAI-compatible). Model id: mistralai/mistral-medium-3-5:batch.
Is Mistral Medium 3.5 (batch) free?
No. Input is $0.8175 per 1M tokens and output is $4.0877 per 1M tokens on Geek Hub (markup included).
What is the context length of Mistral Medium 3.5 (batch)?
Mistral Medium 3.5 (batch) has a 262k tokens context window. It supports up to 209,715 completion tokens.
Does Mistral Medium 3.5 (batch) support tool calling and structured outputs?
Mistral Medium 3.5 (batch) accepts tools and tool_choice for function calling. It also supports structured outputs via a JSON schema in response_format.
When was Mistral Medium 3.5 (batch) released?
Mistral Medium 3.5 (batch) was released on 2026-04-30.

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