Gemini 3.1 Pro Preview pricing
Gemini 3.1 Pro Preview from Google costs $2.00 per 1M input tokens and $12.00 per 1M output tokens. Cached input is $0.200 per 1M. Context window 1,048,576 tokens.
API id gemini-3.1-pro-preview · Google · source · updated 2026-08-11
$2.00
Input / 1M tokens
$12.00
Output / 1M tokens
$0.200
Cached input / 1M
1M
Context window
Long-context pricing
Prompts over 200K tokens are billed at $4.00 per 1M input and $18.00 per 1M output — roughly 2.0× the standard input rate. Budget for this if you send large documents.
What Gemini 3.1 Pro Preview costs in practice
| Workload | Input tokens | Output tokens | Estimated cost |
|---|---|---|---|
| Short chat turn | 1,000 | 500 | $0.0080 |
| Document summary | 50,000 | 2,000 | $0.12 |
| 1M tokens in, 200K out | 1,000,000 | 200,000 | $4.40 |
Estimates use the standard tier and ignore caching discounts, so real bills with repeated prompt prefixes are typically lower.
Common questions
- How much does Gemini 3.1 Pro Preview cost per 1M tokens?
- Gemini 3.1 Pro Preview costs $2.00 per 1M input tokens and $12.00 per 1M output tokens on the standard tier. Cached input is $0.200 per 1M.
- What is Gemini 3.1 Pro Preview's context window?
- Gemini 3.1 Pro Preview accepts up to 1,048,576 tokens in a single request, and can return up to 65,536 output tokens.
- Is there a cheaper Gemini model than Gemini 3.1 Pro Preview?
- Yes. Gemini 2.5 Computer Use Preview is $1.25 per 1M input tokens versus $2.00 for Gemini 3.1 Pro Preview.
- Where does this Gemini 3.1 Pro Preview price come from?
- Directly from Google's published pricing page, re-read every day and normalized to USD per 1,000,000 tokens.
Other Gemini models
- Gemini 3.6 Flash $1.50
- Gemini 3.5 Flash $1.50
- Gemini 3.5 Live Translate $3.50
- Gemini 3.5 Flash-Lite $0.300
- Gemini 3.1 Flash-Lite $0.250
- Gemini Omni Flash Preview $1.50
- Gemini 3.1 Flash Live Preview $0.750
- Gemini 3.1 Flash Image (Nano Banana 2) 🍌 $0.500
- Gemini 3.1 Flash Lite Image (Nano Banana 2 Lite) 🍌 $0.250
- Gemini 3.1 Flash TTS Preview $1.00
- Gemini 3 Flash Preview $0.500
- Gemini 3 Pro Image (Nano Banana Pro) 🍌 $2.00
- Gemini 2.5 Pro $1.25
- Gemini 2.5 Flash $0.300
- Gemini 2.5 Flash-Lite $0.100
- Gemini 2.5 Flash-Lite Preview $0.100