Google: Gemini 3.1 Pro Preview Custom Tools

OpenRouter

Geminitextimageaudiovideo

Pricing

Input Price

$2

Output Price

$12

Cached Input

$0.2

Batch Input

—

Batch Output

—

per 1M tokens · USD

View official pricing →

Capabilities

Context1M

Max Output64K

Tools✓

Batch—

Caching—

Price History

Field	Old	New	Change	Date
cached_input_price_per_million	—	$0.2		2026-08-28

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