Gemini 3.1 Flash Lite Image

gemini-3.1-flash-lite-image is Google's Nano Banana 2 Lite image model. It is optimized for velocity, scale, and low cost when speed and price are the primary constraints.

Google notes that this Lite model is not optimized for multiple reference inputs or multi-turn sequential editing. Use it for fast 1K generation and simple edit workflows; use gemini-3.1-flash-image-preview when reference consistency or broader output tiers matter more.

API surface

Operation	Endpoint	Mode
Image generation	`POST /v1/images/generations`	Sync
Image generation task	`POST /v1/async/images/generations`	Async
Image editing	`POST /v1/images/edits`	Sync
Image editing task	`POST /v1/async/images/edits`	Async

Pricing

Model id	Output tier	Credits / image
`gemini-3.1-flash-lite-image`	1K	2

Request fields

This model uses the same OpenAI-compatible image fields as the rest of Pixapi.

Field	Type	Required	Description
`model`	string	Yes	Use `gemini-3.1-flash-lite-image`.
`prompt`	string	Yes	Describe the desired image or edit.
`image`	string or string[]	Required for edits	Input image URL. Prefer a single reference image for this Lite model.
`n`	number	No	Number of images to return.
`size`	string	No	Output aspect ratio such as `1:1`, `4:3`, `3:4`, `16:9`, or `9:16`.

Example

json

{
  "model": "gemini-3.1-flash-lite-image",
  "prompt": "A fast product thumbnail for an API dashboard",
  "n": 1,
  "size": "1:1"
}

For the shared response shape and edit upload example, see the API Reference.