Bytedance/Seedream 4.5 Image To Image

seedream-4.5-i2i

Seedream 4.5 Image to ImageLLMs.txt

Generate high-fidelity, 4K images with advanced consistency, precise text rendering, and intuitive editing—ideal for posters, branding, and multi-image campaigns.

API Playground API Documentation

API Endpoint URL

Base URL for all API requests to this endpoint.

https://modelslab.com/api/v7/images/image-to-image

API Authentication

Authentication requires a valid API key included in the request. Generate and manage your API keys from your developer dashboard. Include the key in the key parameter for all API requests.

Integration Examples

Production-ready code samples for API integration

{
  "init_image": [
    "https://assets.modelslab.com/generations/a3c87b46-7c1b-45ed-934f-374f3023e378.png",
    "https://assets.modelslab.com/generations/3e9b45b3-f154-4eb4-b7ed-b40258769955.png",
    "https://assets.modelslab.com/generations/e848a962-3a29-40f8-a6e8-762a4877039c.png"
  ],
  "prompt": "Combine this image a girl walking in beach and flying the hot air ballon on the sky",
  "model_id": "seedream-4.5-i2i",
  "aspect_ratio": "1:1",
  "key": "YOUR_API_KEY"
}

SDKs

Official SDKs

Production-ready SDKs and client libraries for all major programming languages

JavaScript

Python

PHP

API Parameters

Technical specifications for API request parameters.

Field Name	Parameter	Technical Description
Init Image	`init_image`	Add your URLs in JPEG, PNG, You can add upto 10 Images
Prompt	`prompt`	The text prompt for the type of image you want to generate
Model Id	`model_id`	Model ID
Aspect Ratio	`aspect_ratio`	tells you the shape of an image by comparing its width to its height. For example, 1:1 is square, 3:4 and 4:3 are slightly tall or wide, 9:16 is vertical, and 16:9 is wide