Skip to content
Router One
Sign up
Back to Models
Media generation

Gemini 3.1 Flash Image Preview API pricing

Model IDgemini-3.1-flash-image-preview
Image generation
Get API KeyRun your first request

Call summary

Per image
$0.50/ image
Output
Image
API Endpoints
1

Gemini 3.1 Flash Image Preview API endpoints

One API key — this model is served on the endpoint below.

POST/v1/images/generationsImage generation · Image models only
Image generation reference

Production reliability

Privacy-safe aggregates from real Router One model calls, so you can assess stability and response latency before integrating.

Not enough production samples yet

This window needs at least 100 eligible requests across 5 independent principals. Metrics appear automatically after that threshold is met.

More Gemini models on Router One

13 other Gemini models on the same gateway and API key — each page lists endpoints and posted price.

Gemini 3 Pro Image Preview$0.50 per imageGemini Nano Banana 2.1$0.10 per imageGemini 2.5 Pro$1.25 in / $10.00 out per 1M1.05M contextGemini 3.1 Flash Lite$0.25 in / $1.50 out per 1M1.05M contextGemini 3.1 Flash Lite Preview$0.25 in / $1.50 out per 1M1.05M contextGemini 3.1 Pro Preview$0.20 in / $12.00 out per 1M1.05M contextGemini 3.5 Flash$0.45 in / $2.70 out per 1M1.05M contextGemini 3.5 Flash Lite$0.30 in / $2.50 out per 1M1.05M contextGemini 3.6 Flash$0.45 in / $2.70 out per 1M1.05M contextGemini 3.7 Flash$0.225 in / $1.125 out per 1M1.05M contextGemini 3.8 Flash$0.225 in / $1.125 out per 1M1.05M contextGemini 3 Flash$0.1125 in / $0.675 out per 1M1.05M contextGemini 3 Flash Preview$1.20 in / $8.00 out per 1M1.05M context

Gemini 3.1 Flash Image Preview at a glance

Gemini 3.1 Flash Image Preview (model ID gemini-3.1-flash-image-preview) is a Gemini-series image model on Router One, billed per generated image at $0.50. No Router One subscription plan includes Gemini 3.1 Flash Image Preview today; every call bills the wallet at its posted rate. Accepts text, image; returns image. Endpoint: POST /v1/images/generations (Image generation). Gemini 3.1 Flash Image Preview also accepts a reference image for edits on POST /v1/images/edits. Token rates and context window do not apply.

The Flash tier of Google's image line, the model the community calls “Nano Banana 2”; gemini-3-pro-image-preview is the Pro tier.

Gemini 3.1 Flash Image Preview FAQ

How much does Gemini 3.1 Flash Image Preview cost on Router One?

Gemini 3.1 Flash Image Preview is billed per generated image on Router One: $0.50, pay as you go.

Is Gemini 3.1 Flash Image Preview included in Router One subscriptions?

No Router One subscription plan includes Gemini 3.1 Flash Image Preview today; every call bills the wallet at its posted rate.

Which endpoints serve Gemini 3.1 Flash Image Preview?

Gemini 3.1 Flash Image Preview is served on POST /v1/images/generations (Image generation). Any Router One API key works there. Gemini 3.1 Flash Image Preview also accepts a reference image for edits on POST /v1/images/edits.

Start using Gemini 3.1 Flash Image Preview

Create an API key and call Gemini 3.1 Flash Image Preview at $0.50 per image on Router One — pay as you go, with per-request cost and latency visibility.

Get API KeyPlans & pay-as-you-go pricingCompare models side by sideQuickstart guideImage generation API guideNano Banana 2 API guide