API reference · Bytedance

bytedance/seedream/4.5/edit

Integrate this model through SandBase's unified API, with production-ready schemas and examples.

IMAGEAsyncOpen model

Production endpoint

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OpenAI-compatible endpoint with unified authentication and usage tracking.

POSThttps://api.sandbase.ai/v1/run

Model IDbytedance/seedream/4.5/edit

Input Schema

5 parameters · 2 required · 3 optional

Parameter	Type	Required	Description
`images`	string[]	Required	The URLs of the images to use for image-to-image generation or image editing.
`prompt`	string	Required	The text prompt to generate an image from. · Min length: 3 · Max length: 50000 · Default: "Replace the clothing in image 1 with the outfit from image 2."
`image_size`	object	Optional	—
`aspect_ratio`	string	Optional	The aspect ratio of the generated image. · Options: 21:9, 16:9, 3:2, 4:3, 1:1, 3:4, 2:3, 9:16 21:916:93:24:31:13:42:39:16
`output_format`	string	Optional	The format of the generated image. · Options: jpeg, png · Default: "png" jpegpng

Output Schema

Field	Type	Description
`id`	string	Unique identifier for the generation task
`status`	string	Task status: pending, running, completed, failed, timeout
`model`	string	Model used for the generation
`outputs`	array	Array of output items
`outputs[].url`	string	URL of the generated artifact
`outputs[].content_type`	string	MIME type (e.g. image/png, video/mp4)
`error`	object \| null	Error details if failed, null on success
`error.type`	string	Machine-readable error type code
`error.message`	string	Human-readable error description

Async Workflow

This model uses asynchronous execution. Submit a request and poll for the result.

Submit — POST to /v1/run, receive an id
Poll — GET /v1/run/{id} until status is completed, failed, or timeout
Retrieve — Read outputs from the completed response

Code Examples

Ready-to-run snippets

# Step 1: Submit
curl -X POST https://api.sandbase.ai/v1/run \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -d '{
  "model": "bytedance/seedream/4.5/edit",
  "images": [
    "https://p9-arcosite.byteimg.com/tos-cn-i-goo7wpa0wc/4b4464161cf3463db6f9463b10939178~tplv-goo7wpa0wc-image.image",
    "https://p9-arcosite.byteimg.com/tos-cn-i-goo7wpa0wc/c23d1b0528a14cb08b684307eabdcc9b~tplv-goo7wpa0wc-image.image"
  ],
  "prompt": "Replace the clothing in image 1 with the outfit from image 2.",
  "output_format": "png"
}'

# Step 2: Poll result (replace <id>)
curl https://api.sandbase.ai/v1/run/<id> \
  -H "Authorization: Bearer YOUR_API_KEY"

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