Nano Banana 2 4K CL Image API Guide

About the Nano Banana 2 4K CL API

Nano Banana 2 4K CL is the dedicated 4K CL route for asynchronous image generation and editing.

Available image sizes: 4K
Operations: generation and edit
Fixed local cost: 390 credits per task
Result delivery: asynchronous task polling

Best uses for Nano Banana 2 4K CL

Fixed-resolution 4K outputReview the request contract below before choosing this model for production traffic.

Applications that specifically require the Nano Banana 2 4K CL IDReview the request contract below before choosing this model for production traffic.

4K generation and reference-image editingReview the request contract below before choosing this model for production traffic.

Model summary

Fixed credit cost: 390
Output type: image
Operations: generation, edit
Image sizes: 4K

Generation request

json

{  "model": "nano-banana-2-4k-cl",  "prompt": "A cinematic product photograph with soft studio lighting",  "aspect_ratio": "1:1",  "image_size": "4K",  "response_format": "url"}

Image field contract

Field	Use	Values
`model`	Required model ID	nano-banana-2-4k-cl
`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	4K
`image_urls`	Required only for edits	1–16 public HTTPS URLs
`response_format`	Optional	url

Compare related models

Compare Nano Banana 2 4K CL with nearby model routes before locking an output size, duration or credit budget into your integration.

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

What can Nano Banana 2 4K CL do?

Nano Banana 2 4K CL supports asynchronous generation and edit. Nano Banana 2 4K CL is the dedicated 4K CL route for asynchronous image generation and editing.

Which output sizes does Nano Banana 2 4K CL support?

Nano Banana 2 4K CL supports 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 2 4K CL use?

The current local price is 390 credits per generation or editing task. The task stores its quoted cost when it is created.