Google: Gemini 3.1 Pro Preview Custom Tools
Analysis Summary
Google: Gemini 3.1 Pro Preview Custom Tools is a specialised variant of the Gemini 3.1 Pro Preview model, configured for custom tool integration. It carries no independent benchmark scores of its own, so its capability cannot be assessed against the broader field with confidence.
The model supports a very large 1M token context window and accepts text, image, file, audio, and video inputs, with tool use and function calling enabled. These are meaningful capabilities for enterprise workflows involving long documents or multimodal data pipelines. However, without benchmark data, the actual reasoning and coding performance of this specific variant is unverified.
At $2.00 input and $12.00 output per million tokens, pricing is high for an unverified variant. Businesses needing confirmed Gemini 3.1 Pro performance should use the benchmarked base model rather than this custom tools variant until independent evaluation data is available.
Assessed June 30, 2026
Editorial notes
Gemini 3.1 Pro Preview Custom Tools is a variant of Google's Gemini 3.1 Pro with no independent benchmark data, supporting broad multimodal input and a 1M token context window.
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Performance Profile
How Google: Gemini 3.1 Pro Preview Custom Tools compares
Its 1M-token context window is larger than 97% of the models we list. At $2.00 per million input tokens it is cheaper than 17% of comparable models.
About Google: 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..
Capabilities
How does Google: Gemini 3.1 Pro Preview Custom Tools stack up?
Compare side-by-side with other legacy models.
Model Information
Pricing
| Token Type | Cost per 1M tokens | Cost per 1K tokens |
|---|---|---|
| Input | $2.00 | $0.002000 |
| Output | $12.00 | $0.012000 |
Live Performance
Live endpoint metrics, refreshed every 30 minutes.
Leaderboard Categories
External Resources
Frequently asked questions about Google: Gemini 3.1 Pro Preview Custom Tools
How much does Google: Gemini 3.1 Pro Preview Custom Tools cost?
Google: Gemini 3.1 Pro Preview Custom Tools costs $2.00 per million input tokens and $12.00 per million output tokens.
What is the context window of Google: Gemini 3.1 Pro Preview Custom Tools?
Google: Gemini 3.1 Pro Preview Custom Tools has a context window of 1,048,756 tokens (1M).
What can Google: Gemini 3.1 Pro Preview Custom Tools do?
Google: Gemini 3.1 Pro Preview Custom Tools supports image/vision input, tool use, and function calling.
Who created Google: Gemini 3.1 Pro Preview Custom Tools?
Google: Gemini 3.1 Pro Preview Custom Tools is developed by Google and was released on February 25, 2026.
