Gemini 3.1 Pro Preview pricing
Gemini 3.1 Pro Preview is Google’s frontier reasoning model, delivering enhanced software engineering performance, improved agentic reliability, and more efficient token usage across complex workflows. 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 2026-09-25 · general-purpose
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.
Gemini 3.1 Pro Preview specifications
- Provider
- API id
gemini-3.1-pro-preview- Model type
- general-purpose
- Context window
- 1M tokens
- Max output
- 66K tokens
- Currency
- USD
- Price source
- First-party
- Last checked
- 2026-09-25
Tags
- flagship
- preview
Gemini 3.1 Pro Preview across providers
The same model, priced by every seller we track. Ranked by the cost of 1M input + 1M output tokens, standard tier; savings measured against buying from the vendor directly.
| Provider | Input /1M | Cached /1M | Output /1M | 1M in + 1M out | vs vendor |
|---|---|---|---|---|---|
| $2.00 | $0.200 | $12.00 | $14.00 | — | |
OpenRouterHost | $2.00 | $0.200 | $12.00 | $14.00 | — |
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.
Head-to-head comparisons
Other Gemini models
- Gemini 3.8 Flash $0.750
- Gemini 3.7 Flash $0.750
- Gemini 3.6 Flash $0.750
- Gemini 3.5 Flash $1.50
- Gemini 3.8 Live, Gemini 3.8 Live Extended Thinking, and Gemini 3.1 Flash Live Preview $0.750
- Gemini 3.5 Live Translate $3.50
- Gemini 3.5 Transcribe Live $3.50
- Gemini 3.5 Transcribe $2.00
- Gemini 3.5 Flash-Lite $0.300
- Gemini 3.1 Flash-Lite $0.250
- Gemini Omni Flash $1.50
- Gemini Omni Flash Preview $1.50
- Gemini 3.1 Flash Image (Nano Banana 2) 🍌 $0.500
- Gemini 3.1 Flash Lite Image (Nano Banana 2 Lite) 🍌 $0.250
- Gemini 3.8 Flash TTS $0.500
- Gemini 3.8 Flash-Lite TTS $0.500