Seedream 3.0

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

• bytedance/seedream-3.0

Try in Playground

Model Overview

This bilingual (Chinese-English) image generation model supports arbitrary image dimensions — as long as the product of width and height remains within a generous limit (up to 2K). It offers faster response times, improved rendering of small text and layouts, stronger visual aesthetics and structural consistency, and high fidelity in fine details.

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

application/json

modelstring · enumRequiredPossible values:

promptstringRequired

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

response_formatstring · enumOptional

The format in which the generated images are returned.

Default: urlPossible values:

sizestringOptional

Specifies the dimensions (width x height in pixels) of the generated image. Must be between [512x512, 2048x2048].

seedintegerOptional

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

guidance_scalenumber · min: 1 · max: 10Optional

The CFG (Classifier Free Guidance) scale is a measure of how close you want the model to stick to your prompt when looking for a related image to show you.

watermarkbooleanOptional

Add an invisible watermark to the generated images.

Default: false

Responses

200Success

application/json

post

/v1/images/generations

JavaScriptPythoncURLHTTP

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: 'bytedance/seedream-3.0',
      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 size 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={
            "model": "bytedance/seedream-3.0",
            "prompt": "A T-Rex relaxing on a beach, lying on a sun lounger and wearing sunglasses.",
            "aspect_ratio": "16:9",        
        }
    )

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

if __name__ == "__main__":
    main()

JS

Response

Generation: {'created': 1751616711, 'data': [{'url': 'https://ark-content-generation-v2-ap-southeast-1.tos-ap-southeast-1.volces.com/seedream-3-0-t2i/02175161671039622600af416b2ca58c9c8a1e1bf93fac0335693.jpeg?X-Tos-Algorithm=TOS4-HMAC-SHA256&X-Tos-Credential=AKLTYjg3ZjNlOGM0YzQyNGE1MmI2MDFiOTM3Y2IwMTY3OTE%2F20250704%2Fap-southeast-1%2Ftos%2Frequest&X-Tos-Date=20250704T081151Z&X-Tos-Expires=86400&X-Tos-Signature=76ad6d2e0eb218521b9ce0bfdc98eaf2aa683e9a0d3840624fb4d413a1fd360e&X-Tos-SignedHeaders=host&x-tos-process=image%2Fwatermark%2Cimage_YXNzZXRzL3dhdGVybWFyay5wbmc_eC10b3MtcHJvY2Vzcz1pbWFnZS9yZXNpemUsUF81'}]}

We obtained the following 1888x301 image by running this code example:

'A T-Rex relaxing on a beach, lying on a sun lounger and wearing sunglasses.'

Here’s an example of a 555×543 image generated using the same prompt:

'A T-Rex relaxing on a beach, lying on a sun lounger and wearing sunglasses.'