Nano Banana 2

nano-banana-2 is better suited to speed-first image generation. Its parameter shape is close to gpt-image-2, but with fewer enum options.

Quick Facts

Item	Value
Model ID	`nano-banana-2`
Type	Image
Region	Global / CN
Best For	Faster image generation, rapid ideation
Priority	Medium, use when speed matters more

Recommended Request Shape

The endpoint remains POST /v1/generations; only the model changes to nano-banana-2.

{
  "model": "nano-banana-2",
  "prompt": "A clean sports shoe product shot, studio light, fast concept visual",
  "aspect_ratio": "1:1",
  "resolution": "2K",
  "n": 1
}

Field Reference

Field	Type	Required	Default	Description
`model`	`string`	Yes	-	Must be `nano-banana-2`
`prompt`	`string`	Yes	-	Image prompt
`reference_images`	`string[]`	No	-	Reference image URL list
`aspect_ratio`	`string`	No	`auto`	Output aspect ratio
`resolution`	`string`	No	`2K`	Output resolution
`n`	`integer`	No	`1`	Image count

Supported Enums

Field	Values
`aspect_ratio`	`auto` `21:9` `16:9` `3:2` `4:3` `1:1` `3:4` `2:3` `9:16`
`resolution`	`2K` `4K`

`nano-banana-2` Integration Notes

It does not support 1K; the lowest documented resolution is 2K.
Use it when you want faster visual iteration.

Fast Iteration Example

{
  "model": "nano-banana-2",
  "prompt": "A clean sports shoe product shot, studio light, fast concept visual",
  "aspect_ratio": "1:1",
  "resolution": "2K"
}

Image Models