gemini-3.1-pro-preview

by Google

Gemini 3.1 Pro Preview is designed to further optimize the performance and reliability of the Gemini 3 Pro series, offering improved reasoning capabilities, greater token efficiency, and a more robust, factually consistent user experience. It is optimized for software-engineering behaviors and usability, and is also suitable for agent workflows that require precise tool invocation and reliable multi-step execution, enabling stable operation across a variety of real-world scenarios.

API Pricing

Input$2 / 1M tokens
Output$12 / 1M tokens
Cache read$0.5 / 1M tokens

Specifications

Context window1,000,000 tokens
Modalitiestext, image, audio, video
Featuresthinking, tool calling, function calling, structured outputs, web, deepsearch, long context
Endpointschat_completions, gemini_api, claude_api

FAQ

What is gemini-3.1-pro-preview?

Gemini 3.1 Pro Preview is designed to further optimize the performance and reliability of the Gemini 3 Pro series, offering improved reasoning capabilities, greater token efficiency, and a more robust, factually consistent user experience. It is optimized for software-engineering behaviors and usability, and is also suitable for agent workflows that require precise tool invocation and reliable multi-step execution, enabling stable operation across a variety of real-world scenarios.

What is the context length of gemini-3.1-pro-preview?

gemini-3.1-pro-preview has a 1,000,000 token context window.

How much does gemini-3.1-pro-preview cost?

On AIHubMix, gemini-3.1-pro-preview costs $2 per million input tokens and $12 per million output tokens. Cached input reads are billed at $0.5 per million tokens.

What modalities does gemini-3.1-pro-preview support?

gemini-3.1-pro-preview accepts text, image, audio and video input.

What features does gemini-3.1-pro-preview support?

gemini-3.1-pro-preview supports thinking, tool calling, function calling, structured outputs, web, deepsearch and long context. Per-protocol parameter support is listed in the capability table on this page.

How do I call gemini-3.1-pro-preview via API?

gemini-3.1-pro-preview is available through the AIHubMix unified API. The API is OpenAI-compatible: point your OpenAI SDK at https://aihubmix.com/v1, use your AIHubMix API key, and set the model name to gemini-3.1-pro-preview — no other code changes needed.

Who develops gemini-3.1-pro-preview?

gemini-3.1-pro-preview is developed by Google. AIHubMix aggregates it alongside models from other providers behind one API and one bill.

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Use gemini-3.1-pro-preview via the AIHubMix unified API — one interface for every major LLM.