Mistral Small 4 API

Model details

Context window

262K tokens

Max output

—

Input

Text, images

Output

Text

Capabilities

Vision, Tool calling, Streaming, JSON output

Interfaces

OpenAI-style Chat Completions, Anthropic-style Messages, OpenAI-style Responses

Why teams pick it

• Mistral Small 4 for OpenAI-style Chat Completions, Anthropic-style Messages, OpenAI-style Responses.

Call Mistral Small 4

Mistral Small 4 answers on any of the APIs below — pick the one your code already speaks and just swap in your Inferray key.

curl https://api.inferray.com/v1/chat/completions \
  -H "Authorization: Bearer inferray_..." \
  -H "Content-Type: application/json" \
  -d '{
  "model": "mistral-small-2603",
  "messages": [
    {
      "role": "user",
      "content": "Hello"
    }
  ]
}'

curl https://api.inferray.com/v1/messages \
  -H "Authorization: Bearer inferray_..." \
  -H "Content-Type: application/json" \
  -d '{
  "model": "mistral-small-2603",
  "max_tokens": 1024,
  "messages": [
    {
      "role": "user",
      "content": "Hello"
    }
  ]
}'

curl https://api.inferray.com/v1/responses \
  -H "Authorization: Bearer inferray_..." \
  -H "Content-Type: application/json" \
  -d '{
  "model": "mistral-small-2603",
  "input": "Hello"
}'

Use Mistral Small 4 in your tools

Every coding agent below has a setup guide. Set the model to mistral-small-2603.

• Claude Code
• Codex
• opencode
• Cline
• Roo Code
• Aider
• Continue

More from Mistral

Alternatives to Mistral Small 4

• DeepSeek V4.1 FlashReasoning and vision at a fraction of flagship prices.DeepSeek
• GPT-4o MiniGPT-4o Mini for OpenAI-style Chat Completions, Anthropic-style Messages, OpenAI-style Responses.OpenAI
• MiniMax M3.1 FlashMiniMax M3.1 Flash for OpenAI-style Chat Completions, Anthropic-style Messages, OpenAI-style Responses.MiniMax

Questions about this model

How much does the Mistral Small 4 API cost?

Mistral Small 4 costs $0.15 per 1M input tokens and $0.6 per 1M output tokens on Inferray. That is the list price, with no gateway fee on top.

Is there a free tier for Mistral Small 4?

No. You add credit and pay Mistral Small 4's list rate for each request — seats, projects, and API keys are free, and pay-as-you-go credit never expires.

Am I charged for failed requests?

No. A request that fails without returning a result is not billed. If a response fails part-way, the tokens already processed before the failure are charged.

Is Mistral Small 4 included in Token Plans?

No. Mistral Small 4 is pay-as-you-go only; Token Plans cover the other text models in the catalog.

Can I use Mistral Small 4 in Claude Code?

Yes. Set ANTHROPIC_BASE_URL to https://api.inferray.com, ANTHROPIC_AUTH_TOKEN to your Inferray key, and ANTHROPIC_MODEL to mistral-small-2603. The same key works in Codex, opencode, Cline, and other agents.

Does Mistral Small 4 support tool calling and vision?

Mistral Small 4 supports tool calling, image input, JSON output and streaming on Inferray.

Is it the real Mistral Small 4?

Yes. A request for mistral-small-2603 is answered by Mistral Small 4 from Mistral, billed at its published list price. Inferray never substitutes a different or smaller model.