Doubao Seedream 4.5 Image Generation

Upgraded version of ByteDance's Doubao Seedream series, with comprehensive improvements in image quality, detail rendering, and style diversity, supporting 2K/4K resolution and multi-image mode.

Try it Online

Test in Playground ↗ · View Models ↗

Quick Start

from openai import OpenAI

client = OpenAI(
    base_url="https://open.dieyuyun.com/v1",
    api_key="YOUR_API_KEY"
)

response = client.images.generate(
    model="doubao-seedream-4.5",
    prompt="A futuristic space station orbiting Earth, cinematic lighting, ultra-high definition",
    size="4096x4096",
    n=1
)

print(response.data[0].url)

Endpoint

Item	Value
Method	POST
Path	/v1/images/generations
Base URL	https://open.dieyuyun.com
Protocol	OpenAI Images API

Authentication

Bearer Token: Authorization: Bearer YOUR_API_KEY

Standard Request Fields

Field	Type	Required	Default	Description
model	string	Yes	—	Model identifier: doubao-seedream-4.5
prompt	string	Yes	—	Image description text, supports Chinese and English, recommended under 300 Chinese characters
size	string	No	4096x4096	Image size (width x height in pixels)
n	integer	No	1	Number of images to generate (max 15). When >1, multi-image mode is enabled
response_format	string	No	url	Response format: url or b64_json

Supported Sizes

Doubao Seedream 4.5 provides two resolution tiers: 2K and 4K (default). The following recommended pixel values are available:

2K Resolution

Size	Aspect Ratio
2048x2048	1:1
2304x1728	4:3
1728x2304	3:4
2848x1600	16:9
1600x2848	9:16
2496x1664	3:2
1664x2496	2:3
3136x1344	21:9

4K Resolution (Default)

Size	Aspect Ratio
4096x4096	1:1
4704x3520	4:3
3520x4704	3:4
5504x3040	16:9
3040x5504	9:16
4992x3328	3:2
3328x4992	2:3
6240x2656	21:9

Extended Parameters

Field	Type	Required	Default	Description
image	string/array	No	—	Reference image URLs or Base64, up to 14
watermark	boolean	No	false	Whether to add an AI-generated watermark
sequential_image_generation	string	No	disabled	auto for multi-image mode / disabled for single image

Request Examples

cURL

curl https://open.dieyuyun.com/v1/images/generations \
  -H "Authorization: Bearer $API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "doubao-seedream-4.5",
    "prompt": "A futuristic space station orbiting Earth, cinematic lighting, ultra-high definition",
    "size": "2048x2048",
    "n": 1
  }'

Python

from openai import OpenAI

client = OpenAI(
    base_url="https://open.dieyuyun.com/v1",
    api_key="YOUR_API_KEY"
)

response = client.images.generate(
    model="doubao-seedream-4.5",
    prompt="A futuristic space station orbiting Earth, cinematic lighting, ultra-high definition",
    size="2048x2048",
    n=1
)

print(response.data[0].url)

Node.js

import OpenAI from 'openai'

const client = new OpenAI({
  baseURL: 'https://open.dieyuyun.com/v1',
  apiKey: 'YOUR_API_KEY',
})

const response = await client.images.generate({
  model: 'doubao-seedream-4.5',
  prompt: 'A futuristic space station orbiting Earth, cinematic lighting, ultra-high definition',
  size: '2048x2048',
  n: 1,
})

console.log(response.data[0].url)

Response Format

Success Response

{
  "created": 1717000000,
  "model": "doubao-seedream-4.5",
  "data": [
    {
      "url": "https://...",
      "size": "2048x2048"
    }
  ],
  "usage": {
    "generated_images": 1,
    "output_tokens": 16384,
    "total_tokens": 16384
  }
}

Field	Type	Description
created	integer	Unix timestamp
model	string	Model identifier used
data	array	Array of generated results
data[].url	string	Image URL
data[].size	string	Actual generated image dimensions
usage	object	Usage statistics
usage.generated_images	integer	Number of images generated
usage.output_tokens	integer	Output token count
usage.total_tokens	integer	Total token count

Error Response

See Error Codes for details.

Seedream 4.0 vs Seedream 4.5

Feature	Seedream 4.0	Seedream 4.5
Image Quality	High	Higher
Minimum Resolution	1K	2K
Detail Rendering	Good	Excellent
Chinese Understanding	Excellent	Superior

Best Practices

• Upgrade preferred: If image quality is critical, choose Doubao Seedream 4.5 over Seedream 4.0 for superior results.
• High-resolution output: Supports 2K/4K resolution, ideal for print materials, advertising assets, and other high-fidelity scenarios.
• Multi-image mode: Set n greater than 1 or enable sequential_image_generation: "auto" to generate stylistically consistent images, perfect for sequential illustrations and storyboards.
• Detail descriptions: Doubao Seedream 4.5 has stronger detail rendering capabilities. Include more detailed descriptions for refined, intricate images.
• Chinese scenarios: Excels with Chinese-language prompts, making it ideal for Chinese-style creative work and domestic business needs.
• Reference images: Provide up to 14 reference images via the image field to guide the model toward specific styles or content.

Rate Limits

See Rate Limits for details.

Related Documentation

• Doubao Seedream 4.0 - Use the Doubao Seedream 4.0 version
• Doubao Seedream 5.0 Lite - Use the Doubao Seedream 5.0 Lite version
• Model List & Pricing - Browse available models and pricing
• Playground - Test image generation interactively