Nano Banana Pro — Edit


Model ID	`google/gemini-3-pro-image-edit`
Family	`gemini-3-pro-image`
Task	`edit`
Provider	Google
Modality	Image

Parameters

string

required

Natural-language instruction describing the edit.

string[]

required

One to fourteen reference image URLs to edit. Must be publicly reachable HTTPS URLs.

string

Output aspect ratio. One of 1:1, 2:3, 3:2, 3:4, 4:3, 4:5, 5:4, 9:16, 16:9, 21:9. Default: 1:1.

string

Output resolution. One of 1K, 2K, 4K. Default: 1K.

string

Webhook URL for completion notification.

Unlike the other Gemini image endpoints, Nano Banana Pro edit does not accept an output_format parameter — omit it.

Example

curl -X POST https://routerbase.com/v1/images/generations \
  -H "Authorization: Bearer sk-rb-xxxxxxxxxxxx" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "google/gemini-3-pro-image-edit",
    "prompt": "Restyle as an oil painting, keep the composition",
    "image_urls": ["https://example.com/portrait.jpg"],
    "aspect_ratio": "1:1"
  }'

from openai import OpenAI

client = OpenAI(
    api_key="sk-rb-xxxxxxxxxxxx",
    base_url="https://routerbase.com/v1",
)

img = client.images.generate(
    model="google/gemini-3-pro-image-edit",
    prompt="Restyle as an oil painting, keep the composition",
    extra_body={
        "image_urls": ["https://example.com/portrait.jpg"],
        "aspect_ratio": "1:1",
    },
)
print(img.data[0].url)

Get Started

API Reference

Nano Banana Pro — Edit

Parameters

Example

​Parameters

​Example

Parameters

Example