Google: Gemini 3.1 Pro Preview Custom Tools

Reasoning Tool Calling Attachments

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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Released Feb 26, 2026

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Available Providers (1)

Provider	Model ID	Input Cost	Output Cost	Context	Max Output	Docs
Kilo Gateway	`google/gemini-3.1-pro-preview-customtools`	$2.00/MTok	$12.00/MTok	1.0M	65.5K

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Tool Calling

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