Nano Banana 2 (Gemini 3.1 Flash Image) API pricing
As of October 21, 2026, Google Nano Banana 2 (Gemini 3.1 Flash Image) costs $0.50 per million input tokens and $3.00 per million output tokens through OpenRouter.
Nano Banana 2 (Gemini 3.1 Flash Image) benchmarks and specs · Every Google model's price
- Input, per million tokens$0.50
- Output, per million tokens$3.00
- Cached input, per millionNo cache price listed
- Context window131K tokens
- Max output33K tokens
- Output speedNot measured
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 | $0.0020 | $2.00 | Yes |
| Repository review | 50K input + 3K output tokens | $0.034 | $34.00 | Yes |
| Agent loop | 200K input + 10K output tokens | $0.130 | $130.00 | No, it would need splitting |
| Solved coding task | One SWE-bench Verified attempt, divided by the share that succeed | Not computable | Not computable |
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: $0.50 input, $3.00 output
Cheaper models as good as Nano Banana 2 (Gemini 3.1 Flash Image)
Nano Banana 2 (Gemini 3.1 Flash Image) has no overall or coding score, so we make no quality claim against it.
Nano Banana 2 (Gemini 3.1 Flash Image) pricing questions
- How much does Nano Banana 2 (Gemini 3.1 Flash Image) cost per million tokens?
- $0.50 per million input tokens and $3.00 per million output tokens, as listed on OpenRouter on October 21, 2026.
- Does Nano Banana 2 (Gemini 3.1 Flash Image) support prompt caching?
- OpenRouter lists no cached input price for this model, so assume every input token is billed at the full rate.
- Has the price of Nano Banana 2 (Gemini 3.1 Flash Image) changed?
- Not since we started recording it daily on October 15, 2026.