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Gemini 3.1 Pro Preview Custom Tools pricing & benchmarks

Gemini 3.1 Pro Preview Custom Tools is available from Google at $2.00 per million input tokens and $12.00 per million output tokens ($4.50 blended at 3:1). It accepts up to 1,048,576 tokens of context. 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...

Pricing
Per million tokens · OpenRouter
Input$2.00
Output$12.00
Blended (3:1)$4.50
Per image<$0.01
Specification
google/gemini-3.1-pro-preview-customtools
Context window1.0M
Max output66K
ReleasedFeb 2026
LicenceProprietary
Modalitiesin:text, in:image, in:file, in:audio, in:video, out:text
No independently-run benchmark scores are published for Gemini 3.1 Pro Preview Custom Tools yet. We show nothing rather than reprinting an unverified figure.
Compare Gemini 3.1 Pro Preview Custom Tools
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FAQ
How much does Gemini 3.1 Pro Preview Custom Tools cost?
Gemini 3.1 Pro Preview Custom Tools costs $2.00 per million input tokens and $12.00 per million output tokens on OpenRouter. At a 3:1 input:output mix that blends to $4.50 per million tokens.
What is Gemini 3.1 Pro Preview Custom Tools's context window?
Gemini 3.1 Pro Preview Custom Tools accepts up to 1,048,576 tokens of context, and can generate up to 65,536 output tokens.