Google API · verified September 25, 2026
Gemini 3.1 Pro API pricing: $2 in / $12 out
Preview. Above 200K tokens: $4 / $18. Preview
Input /1M$2
Output /1M$12
Context1M
Released2026
What real jobs cost
| 1,000 short chats | $6.40 |
| Summarise 100 long reports (20k tokens each) | $5.20 |
| Write a 90,000-word book | $1.48 |
| 10M input + 2M output tokens | $44.00 |
Estimates at the listed price. Use the calculator for your own numbers.
Similar-priced models
| Model | In | Out |
|---|---|---|
| Mistral Medium 3.5 Mistral AI | $1.50 | $7.50 |
| Grok 4.7 xAI | $2 | $6 |
| Gemini 3.5 Flash Google | $1.50 | $9 |
| GPT-6 Sol OpenAI | $2 | $10 |
| Claude Sonnet 5 Anthropic | $2 | $10 |
| GPT-5.6 Terra OpenAI | $2 | $12 |
Price history
No price or plan changes recorded since we started tracking. We re-check every week.
Other Google models
- Gemini 3.8 Flash $0.75 / $3.75
- Gemini 3.7 Flash $0.75 / $3.75
- Gemini 3.6 Flash $0.75 / $3.75
- Gemini 3.5 Flash $1.50 / $9
- Gemini 3.5 Flash-Lite $0.30 / $2.50
- Gemini 3.1 Flash-Lite $0.25 / $1.50
Gemini 3.1 Pro pricing questions
How much does Gemini 3.1 Pro cost?
$2 per million input tokens and $12 per million output tokens, with a 1M context window. Preview. Above 200K tokens: $4 / $18.
How much does 1,000 chats cost on Gemini 3.1 Pro?
About $6.40, assuming 800 input and 400 output tokens per chat.
Is there a cheaper alternative to Gemini 3.1 Pro?
Claude Haiku 4.5 ($1 / $5) costs about 56% less on a typical 3:1 input/output mix. Test whether its quality is enough for your task.
Sources
Checked against the official pages below on September 25, 2026. Prices are USD before local tax. See how we verify prices and the change log.