Market / Google

Gemini 3.1 Pro Preview costs $5.10 per million words.

Google lists it at $2 per million input tokens and $12 per million output tokens on Google’s pricing page, read 4:40 PM Eastern, Oct 7, 2026. It bills about 1,134 tokens for a thousand English words, so a million words, three in for every one out, costs $5.10.

Maker

Google

Input

$2 per million tokens

Output

$12 per million tokens

Cached input

$0.20 per million tokens

Tokens for 1,000 words

1,134, measured by Brass on Oct 7, 2026

Source

Google’s pricing page

Buy a pack to use it in Brass

In the Brass chat it costs $2.50 in and $15.00 out per million tokens, the list price Brass pays plus 25%, shown on every receipt.

Price history

We began tracking Gemini 3.1 Pro Preview on Oct 7, 2026.