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Gemini 3.1 Pro API Pricing — $2.00/M input, $12.00/M output

Flagship multimodal powerhouse with massive 2M+ context window.

Input
$2.00/M
Output
$12.00/M
Blended
$4.50/M
Provider
Verified 2026-04-06source

Speed

Tokens / sec
55
TTFT
420 ms
Rank
#26 of 31
$ / M ÷ t/s
$0.08
Measured with 5 runs on a fixed prompt — see the full methodology.

Cost at scale

Tokens / monthEst. cost (blended 3:1)
100,000$0.45
1,000,000$4.50
10,000,000$45.00
100,000,000$450.00

How Gemini 3.1 Pro compares

Gemini 2.5 Flash Lite$0.18/MGemini 3.5 Flash Lite$0.56/MGemini 3.1 Flash Lite$0.56/MGemini 2.5 Flash$0.85/MGemini 3.1 Flash$1.69/MGPT-5.6 Terra$4.50/MGPT-4o$4.38/MGPT-4.1$3.50/M
See all Google models →

Head-to-head comparisons

Gemini 3.1 Pro vs Claude Opus 4.8Gemini 3.1 Pro vs Grok 4.3Gemini 3.1 Pro vs GPT-5.6 TerraGemini 3.1 Pro vs Claude Sonnet 4.6

FAQ

Is Gemini 3.1 Pro cheaper than GPT-5.6 Terra?

Gemini 3.1 Pro costs $4.50/M blended tokens, GPT-5.6 Terra costs $4.50/M — GPT-5.6 Terra is cheaper.

How much does 1 million tokens cost with Gemini 3.1 Pro?

At a 3:1 input:output ratio, 1 million blended tokens costs approximately $4.50. Pure input costs $2.00/M; pure output costs $12.00/M.

Who provides Gemini 3.1 Pro?

Gemini 3.1 Pro is served by Google. Pricing was last verified on 2026-04-06 against https://ai.google.dev/gemini-api/docs/pricing.

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