Gemini 3.1 Pro Preview API pricing
As of October 21, 2026, Google Gemini 3.1 Pro Preview costs $2.00 per million input tokens and $12.00 per million output tokens through OpenRouter, with cached input at $0.20 per million.
Gemini 3.1 Pro Preview benchmarks and specs · Every Google model's price
- Input, per million tokens$2.00
- Output, per million tokens$12.00
- Cached input, per million$0.20
- Context window1.05M tokens
- Max output66K tokens
- Output speed130 tok/s
What a request costs
Three fixed token mixes at the list price, without cache or batch discounts. For a whole month, use the calculator.
| Workload | Tokens | One request | 1,000 requests | Fits the context window |
|---|---|---|---|---|
| Chat turn | 1K input + 500 output tokens | $0.0080 | $8.00 | Yes |
| Repository review | 50K input + 3K output tokens | $0.136 | $136.00 | Yes |
| Agent loop | 200K input + 10K output tokens | $0.520 | $520.00 | Yes |
| Solved coding task | One SWE-bench Verified attempt, divided by the share that succeed | $0.99 | $990.00 |
Price history
We read this price every day and have since October 15, 2026. It has not changed yet; any change will be listed here with its date.
- October 15, 2026 First recorded: $2.00 input, $12.00 output
Cheaper models as good as Gemini 3.1 Pro Preview
Models within two points of Gemini 3.1 Pro Preview or above it on the Artificial Analysis Intelligence Index, with a lower output price. Cheapest first.
- Ling 3.1 Flash$0.225 Overall 41.1 against 29.7 · 98% cheaper output
- MiMo-V2.6-Flash$0.28 Overall 37.9 against 29.7 · 98% cheaper output
- Claude Haiku 5.5$0.50 Overall 43.4 against 29.7 · 96% cheaper output
- GLM 5.3 Flash$0.50 Overall 41.8 against 29.7 · 96% cheaper output
- GPT-6 Luna$0.50 Overall 38.1 against 29.7 · 96% cheaper output
Gemini 3.1 Pro Preview pricing questions
- How much does Gemini 3.1 Pro Preview cost per million tokens?
- $2.00 per million input tokens and $12.00 per million output tokens, as listed on OpenRouter on October 21, 2026.
- Does Gemini 3.1 Pro Preview support prompt caching?
- Yes. OpenRouter lists cached input at $0.20 per million tokens, against $2.00 for uncached input.
- Is there a cheaper model as good as Gemini 3.1 Pro Preview?
- Ling 3.1 Flash scores 41.1 on the Artificial Analysis Intelligence Index, within two points of Gemini 3.1 Pro Preview or above it, and costs $0.225 per million output tokens.
- Has the price of Gemini 3.1 Pro Preview changed?
- Not since we started recording it daily on October 15, 2026.