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Gemini 3.1 Pro Preview Custom ToolsAPI
Gemini 3.1 Pro Preview Custom Tools (Google): live API pricing, context window and the best open-source alternatives, tracked daily by olud.ai.
Prices update automatically — checked hourly against provider list prices.
About this model
Gemini 3.1 Pro Preview Custom Tools is a commercial AI model by Google. The specifications below are tracked automatically: pricing is refreshed hourly from public list prices, so the numbers on this page reflect the current cost of using the model through its API.
Frequently asked questions
What is Gemini 3.1 Pro Preview Custom Tools?
Gemini 3.1 Pro Preview Custom Tools is an AI language model from Google. It is a proprietary model, available through an API.
Is Gemini 3.1 Pro Preview Custom Tools free?
Gemini 3.1 Pro Preview Custom Tools is not free: it costs $2 per million input tokens and $12 per million output tokens. Open-weight alternatives can be self-hosted at no per-token cost.