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Imagen 4 Preview

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

  • google/imagen4/preview

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Model Overview

Google’s highest quality image generation model as of May 2025.

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:
promptstring · max: 400Required

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

convert_base64_to_urlbooleanOptional

If True, the URL to the image will be returned; otherwise, the file will be provided in base64 format.

Default: true
num_imagesinteger · max: 4Optional

The number of images to generate.

Default: 1
seedinteger · max: 4294967295Optional

The same seed and the same prompt given to the same version of the model will output the same image every time.

enhance_promptbooleanOptional

Optional parameter to use an LLM-based prompt rewriting feature for higher-quality images that better match the original prompt. Disabling it may affect image quality and prompt alignment.

Default: true
aspect_ratiostring · enumOptional

The aspect ratio of the generated image.

Default: 1:1Possible values:
person_generationstring · enumOptional

Allow generation of people.

Default: allow_adultPossible values:
safety_settingstring · enumOptional

Adds a filter level to safety filtering.

Default: block_medium_and_abovePossible values:
add_watermarkbooleanOptional

Add an invisible watermark to the generated images.

Default: false
Responses
200Success
application/json
post
/v1/images/generations
async function main() {
  const response = await fetch('https://api.aimlapi.com/v1/images/generations', {
    method: 'POST',
    headers: {
      'Authorization': 'Bearer <YOUR_AIMLAPI_KEY>',
      'Content-Type': 'application/json',
    },
    body: JSON.stringify({
      model: 'google/imagen4/preview',
      prompt: 'A T-Rex relaxing on a beach, lying on a sun lounger and wearing sunglasses.',
    }),
  });

  const data = await response.json();
  console.log(JSON.stringify(data, null, 2));
}

main();
200Success
{
  "data": [
    {
      "url": "https://cdn.aimlapi.com/generations/hedgehog/1749730923700-29fe35d2-4aef-4bc5-a911-6c39884d16a8.png",
      "b64_json": null
    }
  ],
  "meta": {
    "usage": {
      "tokens_used": 120000
    }
  }
}

Quick Example

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

import requests
import json   # for getting a structured output with indentation

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={
            "prompt": "Racoon eating ice-cream",
            "model": "google/imagen4/preview",
            "aspect_ratio": "16:9"
        }
    )

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

if __name__ == "__main__":
    main()
Response
{
  images: [
    {
      url: 'https://cdn.aimlapi.com/eagle/files/panda/tI_UTxAzqLqWZZqSoNqsO_output.png',
      content_type: 'image/png',
      file_name: 'output.png',
      file_size: 1665805
    }
  ],
  seed: 3360388064
}

So we obtained the following 1408x768 image by running this code example:

In reality, raccoons shouldn’t be given ice cream or chocolate—it’s harmful to their metabolism. But in the AI world, raccoons party like there’s no tomorrow.
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