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by Google DeepMind

Google: Gemini 3.1 Pro Preview Custom Tools.

multimodal closed 1M ctx
Cheapest input
$2.0/M
on OpenRouter
Cheapest output
$12.0/M
on OpenRouter
Hosted equiv.
~$4.32/hr
@ 100 tok/s on OpenRouter

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...

Hosted API only

No self-host path — closed weights.

Google: Gemini 3.1 Pro Preview Custom Tools's weights aren't published. Use it via the access providers below.

Where to use it

Cheapest hosted endpoints.

Provider Access $/M in $/M out
OpenRouter api aggregator $2.0 $12.0 Launch ↗
FAQ

Frequently asked.

How do I run Google: Gemini 3.1 Pro Preview Custom Tools?
Google: Gemini 3.1 Pro Preview Custom Tools is a closed-source API model. The cheapest way to access it is through the API providers listed on this page (direct API, aggregators, and hosted chat UIs).
Where can I access Google: Gemini 3.1 Pro Preview Custom Tools?
Google: Gemini 3.1 Pro Preview Custom Tools is available via OpenRouter. Each access option lists its own pricing (per million tokens or hourly hosting).
How much does it cost to run Google: Gemini 3.1 Pro Preview Custom Tools?
API pricing starts at $2.0/M input tokens and $12.0/M output tokens. Self-hosting cost depends on the GPU you rent — see the Run It Yourself tab.
Is Google: Gemini 3.1 Pro Preview Custom Tools open-source or proprietary?
Google: Gemini 3.1 Pro Preview Custom Tools is a proprietary model from Google DeepMind. Access is API-only — there are no public weights to download.