Gemini 3.1 Pro

by Google

Gemini 3.1 Pro is a model from Google, released on February 19, 2026. It has a 1M-token context window and can generate up to 1M output tokens. API pricing is $2 per 1M input tokens and $12 per 1M output tokens. It ranks #37 of 220 models by Intelligence Score with a score of 42.9.

Gemini 3.1 Pro is the latest model in the Gemini 3 series. It excels at complex tasks requiring broad world knowledge and advanced reasoning across modalities. Gemini 3.1 Pro uses dynamic thinking by default to reason through prompts, and features a 1 million-token input context window with 64k output tokens.

Key specs

ProviderGoogle
Release date2026-02-19
Licenseproprietary
Context window1M tokens
Max output1M tokens
Input price$2 / 1M tokens
Output price$12 / 1M tokens
Intelligence Score42.9
Coding index30
Output speed18 tokens/s

Quick answers

What is the context window of Gemini 3.1 Pro?

Gemini 3.1 Pro has a context window of 1M tokens, with a maximum output of 1M tokens per response.

How much does Gemini 3.1 Pro cost?

Gemini 3.1 Pro costs $2 per 1M input tokens and $12 per 1M output tokens through the API.

Is Gemini 3.1 Pro open source?

No. Gemini 3.1 Pro is a proprietary model from Google (proprietary license).

When was Gemini 3.1 Pro released?

Google released Gemini 3.1 Pro on February 19, 2026.

How does Gemini 3.1 Pro compare to Claude Opus 5.5 (Reasoning)?

Gemini 3.1 Pro scores 42.9 on the Intelligence Score versus 60.5 for Claude Opus 5.5 (Reasoning), the current #1. Input pricing is $2 vs $4 per 1M tokens.

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