Nano Banana Pro Image API Guide

About the Nano Banana Pro API

Nano Banana Pro is a multi-resolution image generation and editing route with 1K, 2K and 4K output options.

Available image sizes: 1K, 2K, and 4K
Operations: generation and edit
Fixed local cost: 60 credits per task
Result delivery: asynchronous task polling

Best uses for Nano Banana Pro

Multi-resolution image productionReview the request contract below before choosing this model for production traffic.

Generation and editing through one model IDReview the request contract below before choosing this model for production traffic.

Workflows that may scale from 1K drafts to 4K outputReview the request contract below before choosing this model for production traffic.

Model summary

Fixed credit cost: 60
Output type: image
Operations: generation, edit
Image sizes: 1K, 2K, 4K

Generation request

json

{  "model": "nano-banana-pro",  "prompt": "A cinematic product photograph with soft studio lighting",  "aspect_ratio": "1:1",  "image_size": "1K",  "response_format": "url"}

Image field contract

Field	Use	Values
`model`	Required model ID	nano-banana-pro
`prompt`	Required generation or editing instruction	1–20,000 characters
`aspect_ratio`	Output ratio	auto, 1:1, 16:9, 9:16, 4:3, 3:4
`image_size`	Resolution tier	1K, 2K, 4K
`image_urls`	Required only for edits	1–16 public HTTPS URLs
`response_format`	Optional	url

Compare related models

Compare Nano Banana Pro with nearby model routes before locking an output size, duration or credit budget into your integration.

Nano Banana FastNano Banana Fast is the 1K route for compact generation and editing tasks with a low fixed local credit cost.Nano Banana Pro VTNano Banana Pro VT exposes the VT model route for asynchronous generation and editing in 1K, 2K or 4K.Nano Banana 2Nano Banana 2 is a multi-resolution generation and editing route covering 1K, 2K and 4K at a fixed local task cost.

Nano Banana Pro API FAQ

What can Nano Banana Pro do?

Nano Banana Pro supports asynchronous generation and edit. Nano Banana Pro is a multi-resolution image generation and editing route with 1K, 2K and 4K output options.

Which output sizes does Nano Banana Pro support?

Nano Banana Pro supports 1K, 2K, and 4K. Use the exact model ID and size fields documented on this page so the request can be validated locally.

How many credits does Nano Banana Pro use?

The current local price is 60 credits per generation or editing task. The task stores its quoted cost when it is created.