Using Gemini 3.1 Pro Preview Custom Tools on OpenRouter

Implementation guide · Gemini 3.1 · Google DeepMind

Serverless

Quick Start

1
Create an account at OpenRouter and generate an API key.
2
Use the OpenRouter SDK or REST API to call google/gemini-3.1-pro-preview-customtools — see the documentation for request format.
3
You'll be billed $2.00/1M input, $12.00/1M output tokens. See full pricing.

API Portal Documentation Pricing Model Card

Code Examples

See OpenRouter documentation for integration details.

About OpenRouter

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