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gemini-3.1-pro-previewChatExamples verified 2026-09-25

Gemini 3.1 Pro Preview

Advanced reasoning preview at $2 / $12. Built for complex analysis and long reasoning chains.

Official price
$2 / $12/ 1M tokensInput / output
Notes
  • Thinking is on by default and can't be fully turned off; a small max_tokens can leave only thinking and no answer.
  • Preview model with no stability guarantee.
  • In the "Gemini (all models, incl. image)" group, input over 200K tokens bills input at ×2 and output at ×1.5.
Read the integration guideJSON Schema

Pricing

Official price in USD. Actual charge = official price × group multiplier.

Input
$2 / 1M tokens
Cached input
$0.20 / 1M tokens
Output
$12 / 1M tokens

Endpoints

Same family

gemini-3.8-flashgemini-3.7-flashgemini-3.6-flashgemini-3.5-flash-litegemini-3.5-flashgemini-3.1-pro-preview-customtoolsgemini-3.1-flash-lite-previewgemini-3.1-flash-litegemini-3-flash-previewgemini-2.5-progemini-2.5-flash-litegemini-2.5-flash

Prices come from the public catalog; limits come from specs exported from the gateway’s validation code. Actual charge = official price × group multiplier.