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Google · Language model
Gemini 3.1 Pro Preview Custom Tools
google/gemini-3.1-pro-preview-customtools- Language
Gemini 3.1 Pro Preview Custom Tools is a variant of Gemini 3.1 Pro that improves tool selection behavior by preventing overuse of a general bash tool when more efficient third-party...
Specifications
- Context window
- 1,048,576 tokens
- Max output
- 65,536 tokens
- Input
- text, audio, image, video, file
- Output
- text
- Reasoning effort
- high, medium, low (always on)
- Tokenizer
- Gemini
Supported parameters
Accepted by the model and forwarded as-is by the gateway.
- max_tokens
- reasoning
- reasoning_effort
- response_format
- seed
- structured_outputs
- temperature
- tool_choice
- tools
- top_p
Use it
POST /api/v1/chat/completions · MCP chat · full reference
curl https://omnirail.org/api/v1/chat/completions \
-H "Authorization: Bearer $OMNIRAIL_KEY" -H "Content-Type: application/json" \
-d '{"model":"google/gemini-3.1-pro-preview-customtools","messages":[{"role":"user","content":"Hello"}],"max_tokens":300}'