Gemini 3.1 Flash (Image) API Pricing
Gemini 3.1 Flash (Image) by Google costs $0.50 per million input tokens and $3.00 per million output tokens.
Price verified from Google's pricing page.
Rates and limits
- Input / 1M
- $0.50
- Output / 1M
- $3.00
- Cached input / 1M
- Not listed
- Batch discount
- 50% off
- Context window
- 66K tokens
- Released
- April 2026
Pricing note: Image-generation model. Output shown is the text-and-thinking rate; image output is $60 per 1M tokens (about $0.067 per 1K image). No context-caching price is listed.
What Gemini 3.1 Flash (Image) costs per month
Token volume split 3:1 between input and output, with no prompt caching.
| Tokens per month | Input / output | Standard | Batch API |
|---|---|---|---|
| 1M | 750K / 250K | $1.13 | $0.56 |
| 10M | 7.5M / 2.5M | $11.25 | $5.63 |
| 100M | 75M / 25M | $112.50 | $56.25 |
Where to run Gemini 3.1 Flash (Image)
Prices above are Google's direct rates. Cloud platforms can charge differently; the cloud platform view compares them.
- Google AI Studio (Gemini API)Direct API
- Google Cloud Vertex AICloud / platform
- OpenRouterCloud / platform
Gemini 3.1 Flash (Image) pricing FAQ
How much does Gemini 3.1 Flash (Image) cost per million tokens?
Gemini 3.1 Flash (Image) costs $0.50 per million input tokens and $3.00 per million output tokens, as listed on Google's pricing page on September 30, 2026.
How much does Gemini 3.1 Flash (Image) cost for 10 million tokens a month?
About $11.25 a month, assuming 7.5 million input and 2.5 million output tokens with no prompt caching, or $5.63 through the batch API.
What is the context window of Gemini 3.1 Flash (Image)?
Gemini 3.1 Flash (Image) accepts up to 65,536 tokens of context.
Does Gemini 3.1 Flash (Image) support prompt caching?
No cached-input price is listed for Gemini 3.1 Flash (Image), so repeated prompt prefixes are billed at the standard input rate.
Is there a batch discount for Gemini 3.1 Flash (Image)?
Yes. Requests sent through the batch API cost 50% less: $0.25 per million input tokens and $1.50 per million output tokens.
Where can I use the Gemini 3.1 Flash (Image) API?
Gemini 3.1 Flash (Image) is available through Google AI Studio (Gemini API), Google Cloud Vertex AI, and OpenRouter.
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Prices shown as input / output per million tokens. All model prices · Side-by-side comparison