Gemini 3.1 Pro pricing and token costs
Gemini 3.1 Pro is a Google model with a 1,000,000-token context window. Rates below are per million tokens, and are the ones in effect today.
Preview. Google ships this model as a preview rather than generally available. Preview pricing can change, and a preview model can be withdrawn or renamed without the notice a generally available one gets — worth knowing before building against the rate above.
Pricing
- Input, per 1M tokens
- $2.00
- Output, per 1M tokens
- $12.00
- Context window
- 1,000,000 tokens
- Tokenizer
- Google tokenizer
Input and output combined.
Estimated from character length, in your browser.
Long-context tier. Above 200,000 input tokens, the whole request bills at $4.00 input and $18.00 output per million — not only the tokens above the threshold. Ignoring this understates a large paste by the full multiplier.
Prices last updated . Check them against OpenAI, Anthropic and Google.
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Common questions
- How much does Gemini 3.1 Pro cost per million tokens?
- $2.00 per million input tokens and $12.00 per million output tokens.
- What is the context window of Gemini 3.1 Pro?
- 1,000,000 tokens, covering input and output combined.
- Which tokenizer does Gemini 3.1 Pro use?
- Gemini 3.1 Pro uses Google's own tokenizer, which is not published in a form that can run in a browser. Counts here are a character-based estimate and are labelled "est".
- Does Gemini 3.1 Pro charge more for long prompts?
- Yes. Above 200,000 input tokens the entire request bills at $4.00 per million input and $18.00 per million output — not just the tokens above the threshold.
- Is Gemini 3.1 Pro generally available?
- No. Google ships Gemini 3.1 Pro as a preview, so its pricing can change and the model can be withdrawn or renamed without the notice a generally available model gets.
Figures come from Google’s published list prices and are checked against every article on this site that quotes them at build time. They are still estimates of what a request costs — verify against your own billing before committing to them.