Gemini 2.5 Flash Image (Nano Banana)

gemini-2.5-flash-image is the fast Gemini image model for prompt-based image generation and editing. nano-banana is an alias for the same model id contract, so it is documented on this page instead of as a separate model.

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

Credits

Model id	Credits / image
gemini-2.5-flash-image	2
nano-banana	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-2.5-flash-image or the alias nano-banana.
prompt	string	Yes	Describe the desired image or edit.
image	file or file[]	Required for edits	Send via /v1/images/edits when editing input images.
n	number	No	Number of images to return.
size	string	No	Output size such as 1024x1024 or another model-supported size.
response_format	string	No	url or b64_json when supported.

Example

{
  "model": "gemini-2.5-flash-image",
  "prompt": "A polished product photo of a ceramic coffee cup",
  "n": 1,
  "size": "1024x1024"
}

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