Gemini 3.1 Pro API Pricing — $2.00/M input, $12.00/M output
Flagship multimodal powerhouse with massive 2M+ context window.
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 / month | Est. 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
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.
