Imagen 4 Fast Generate

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

• google/imagen-4.0-fast-generate-001

Try in Playground

Model Overview

This model is optimized for speed, offering faster image generation compared to other Imagen 4 variants like Imagen 4 Generate 001 (standard) and Imagen 4 Ultra Generate 001 (higher quality, slower).

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

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/imagen-4.0-fast-generate-001",
    "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   # 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/imagen-4.0-fast-generate-001",
            "aspect_ratio": "16:9"
        }
    )

    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/imagen-4.0-fast-generate-001',
      prompt: 'Racoon eating ice-cream',
      aspect_ratio: '16:9'
    }),
  });

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

main();

Response

{
  "data": [
    {
      "mime_type": "image/png",
      "url": "https://cdn.aimlapi.com/generations/guepard/1758236595733-514db8bc-7cba-4d7b-8d6b-237c20375995.png",
      "prompt": "A raccoon, with a mischievous grin, holds a melting cone of mint chocolate chip ice cream in its front paws, enjoying a warm summer day in a picturesque park. The sunlight creates a gentle, golden glow around the raccoon, illuminating the soft, fluffy fur. The cone is dripping with ice cream, creating a scene of playful chaos. A detailed, high-quality photo with a shallow depth of field, blurring the background foliage, creating a soft and dreamy aesthetic. The vibrant green trees and lush grass provide a beautiful and tranquil setting for the raccoon's treat."
    }
  ],
  "meta": {
    "usage": {
      "tokens_used": 42000
    }
  }
}

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.