Nano Banana Pro (Gemini 3 Pro Image)

This documentation is valid for the following list of our models:

• google/nano-banana-pro

• google/gemini-3-pro-image-preview

Both IDs listed above refer to the same model; we support them for backward compatibility.

Try in Playground

Model Overview

Google’s smartest text-to-image model as of the November 2025 preview release.

Setup your API Key

If you don’t have an API key for the AI/ML API yet, feel free to use our Quickstart guide.

API Schema

post

Body

modelstring · enumRequiredPossible values:

promptstringRequired

The text prompt describing the content, style, or composition of the image to be generated.

aspect_ratiostring · enumOptional

The aspect ratio of the generated image.

Default: 1:1Possible values:

resolutionstring · enumOptional

The size of the generated image.

Default: 1KPossible values:

num_imagesnumber · min: 1 · max: 4Optional

The number of images to generate.

Default: 1

providerstringOptional

Provider routing override. google runs native Google with no fallback; fal runs the fal.ai mirror; auto (default) uses the Google -> fal.ai fallback chain. Case-insensitive.

Example: auto

Responses

200Success

application/json

post/v1/images/generations

curl -L \
  --request POST \
  --url 'https://api.aimlapi.com/v1/images/generations' \
  --header 'Authorization: Bearer <YOUR_AIMLAPI_KEY>' \
  --header 'Content-Type: application/json' \
  --data '{
    "model": "google/nano-banana-pro",
    "prompt": "A T-Rex relaxing on a beach, lying on a sun lounger and wearing sunglasses."
  }'

200Success

{
  "data": [
    {
      "url": "https://cdn.aimlapi.com/generations/hedgehog/1749730923700-29fe35d2-4aef-4bc5-a911-6c39884d16a8.png",
      "b64_json": null
    }
  ],
  "meta": {
    "usage": {
      "credits_used": 120000
    }
  }
}

Quick Example

Let's generate an image of the specified aspect ratio using a simple prompt.

Python

import requests
import json

def main():
    response = requests.post(
        "https://api.aimlapi.com/v1/images/generations",
        headers={
            # Insert your AIML API Key instead of <YOUR_AIMLAPI_KEY>:
            "Authorization": "Bearer <YOUR_AIMLAPI_KEY>",
            "Content-Type": "application/json",
        },
        json={
            "model": "google/nano-banana-pro",
            "prompt": "Racoon eating ice-cream",
            "aspect_ratio": "1:1",
            "resolution": "1K"
        }
    )

    data = response.json()
    print(json.dumps(data, indent=2, ensure_ascii=False))

if __name__ == "__main__":
    main()

JS

async function main() {
  const response = await fetch('https://api.aimlapi.com/v1/images/generations', {
    method: 'POST',
    headers: {
      // Insert your AIML API Key instead of <YOUR_AIMLAPI_KEY>:
      'Authorization': 'Bearer <YOUR_AIMLAPI_KEY>',
      'Content-Type': 'application/json',
    },
    body: JSON.stringify({
      model: 'google/nano-banana-pro',
      prompt: 'Racoon eating ice-cream',
      aspect_ratio: '1:1',
      resolution: '1K'
    }),
  });

  const data = await response.json();
  console.log(data);
}

main();

Response

{
  "description": "",
  "data": [
    {
      "url": "https://cdn.aimlapi.com/flamingo/files/b/monkey/rvEPfEJe--7Nf41TwCGy3.png",
      "content_type": "image/png",
      "width": null,
      "height": null,
      "file_name": "rvEPfEJe--7Nf41TwCGy3.png"
    }
  ],
  "meta": {
    "usage": {
      "tokens_used": 315000
    }
  }
}

So we obtained the following 1024x1024 image by running this code example:

"aspect_ratio": "1:1", "resolution": "1K"

Here’s an example of the output using alternative resolution and aspect_ratio parameters:

"aspect_ratio": "16:9", "resolution": "2K"