Google API pricing
Gemini 3.1 Pro (preview) pricing
Input / 1M tokens
$2
Output / 1M tokens
$12
Prompts over 200,000 tokens cost $4 in and $18 out per million, for the whole request.
Source: Google pricing, checked 1 Nov 2026. API name: gemini-3.1-pro-preview.
Price your prompt on Gemini 3.1 Pro (preview)
What a prompt costs on Gemini 3.1 Pro (preview)
| Example | Tokens in / out | Cost | 1,000 a day, per month |
|---|---|---|---|
| A short question and answer | 50 / 300 | $0.0037 | $111.00 |
| A one-page document summarised | 700 / 400 | $0.0062 | $186.00 |
| A 300-line code file reviewed | 4,000 / 1,200 | $0.022 | $672.00 |
| A 50-page report summarised | 35,000 / 1,500 | $0.088 | $2,640 |
Token sizes are typical, not exact. Replies include any thinking the model does.
Other Gemini models
Gemini 4 ArgonGemini 3.8 FlashGemini 3.5 Flash-LiteGemini 2.5 ProGemini 2.5 Flash
FAQ
How much does Gemini 3.1 Pro (preview) cost?
$2 per million input tokens and $12 per million output tokens on Google's standard API tier. Checked 1 Nov 2026.
What does one prompt cost on Gemini 3.1 Pro (preview)?
A 1,000-token prompt with a typical medium-length reply costs about $0.012. Paste your own prompt into the calculator for an exact figure.