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Google Gemini API model

Gemini 3.1 Pro Preview Custom Tools

API pricing per million tokens

gemini-3-1-pro-preview-customtools ReasoningChecked 8h ago
Cost calculator Compare
Input
$2
per 1M, list
Output
$12
per 1M tokens
Cached input
$0.2
no batch tier listed
Context
1M
66K max output

Where to buy it (1)

  • Google Gemini API (list)the lab's own API$2 / $12cached $0.2

Through a gateway

Your own numbers

100M input and 20M output tokens a month: $440.00 direct.

Related models

About 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...

Takes text, audio, image, video, files in and returns text. First listed Mar 3, 2026. Blended price $4.5 per 1M tokens at 3 input to 1 output.

OpenRouter listing Google Gemini API pricing page
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Questions

How much does Gemini 3.1 Pro Preview Custom Tools cost?

$2 per million input tokens and $12 per million output tokens, with cached input at $0.2.

What is the context window of Gemini 3.1 Pro Preview Custom Tools?

1M tokens, with up to 66K tokens of output.

List prices from providers' pages on the date shown; your contract may differ. Logos via logo.dev; trademarks belong to their owners.

Weekly: LLM API list prices that changed, Thursday mornings.