CODE & AGENTS · Google

Gemini 3.1 Pro Preview Custom Tools

Gemini 3.1 Pro Preview Custom Tools is a reasoning, tool-using model from Google in the Gemini family, living in The Cedar Forest (code & agents). It reads text, audio, files, images and video and writes text, with a 1.05M-token context window and up to 66K tokens of output. On OpenRouter it costs $2.00 per million input tokens and $12.0 per million output tokens.

See Gemini 3.1 Pro Preview Custom Tools in 3D Open in the Worktable View on OpenRouter

Specifications

Provider: Google
Family: Gemini
Province: The Cedar Forest
Context window: 1.05M tokens
Maximum output: 66K tokens
Input / 1M tokens: $2.00
Output / 1M tokens: $12.0
Accepts: text, audio, files, images, video
Produces: text
Reasoning: Yes
Tool use: Yes
Added to OpenRouter: 2026-02-25
Model ID: google/gemini-3.1-pro-preview-customtools
Price history: —All recorded prices

From the 2026-10-24 catalog snapshot. Prices are US dollars per million tokens.

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