ReasonRank

Models / google

gemini-3.1-pro pricing

Input

$2

per 1M tokens

Output

$12

per 1M tokens

100k calls / month*

$600.00

*1,200 in / 300 out avg tokens

provider list price · as of 2026-07-02 · source: the same table ReasonRank uses in production

How much does gemini-3.1-pro cost per million tokens?

gemini-3.1-pro costs $2 per million input tokens and $12 per million output tokens (list price, as of 2026-07-02).

What does gemini-3.1-pro cost at 100k calls a month?

At 100,000 calls/month averaging 1,200 input and 300 output tokens, gemini-3.1-pro costs about $600.00/month at list prices.

Is a cheaper model good enough to replace gemini-3.1-pro?

Price tables can’t answer that — it depends on your workload. ReasonRank tests candidate models on your own cases with a statistical non-inferiority gate, then verifies savings on live traffic.

Compare

gemini-3.1-pro vs gpt-5.4claude-sonnet-5 vs gemini-3.1-progemini-3.1-pro vs gemini-3.5-flashgemini-3.1-pro vs gpt-5.5claude-opus-4-8 vs gemini-3.1-pro

Wondering if gemini-3.1-pro is over- or under-powered for your workload? Estimate with the free calculator, or connect your traffic and let ReasonRank verify the answer on your own cases.