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Google: Gemini 3.1 Pro Preview Custom Tools

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...

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Specification
Model ID
google/gemini-3.1-pro-preview-customtools
Modality
Text+image+file+audio+video >text
Context
1.0M tokens
Input
$2.00/1M
Output
$12.00/1M
Image
$2.00/1M
Audio
$2.00/1M
Web search
$14000.00/1M
Updated
Sep 20, 2026
Scores
Capabilities
  • Supports tool calling
  • Supports vision inputs
  • Supports long-context workflows
  • Supports deeper reasoning tasks

Input and output

Accepts Text, Audio, Image, Video, File inputs. Returns Text outputs.

Supported parameters

include_reasoningmax_tokensreasoningreasoning_effortresponse_formatseedstructured_outputstemperaturetool_choicetoolstop_p

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