Seedream v4.5 Image Editing

POST/v1/run

A new-generation image creation model from ByteDance, Seedream 4.5 integrates text-to-image generation and image editing into a single unified architecture, delivering high-fidelity visuals, precise prompt control, and seamless creative workflows for professional AIGC applications.

Request body

Submit an async generation request. The model field selects the model; other fields are model-specific input parameters.

stringmodelrequired

Model identifier. Set to bytedance/seedream/4.5/edit.

Default: bytedance/seedream/4.5/edit

array<string>imagesrequired

The URLs of the images to use for image-to-image generation or image editing.

stringpromptrequired

The text prompt to generate an image from.

Default: Replace the clothing in image 1 with the outfit from image 2.

Optional<string>aspect_ratio

The aspect ratio of the generated image.

Allowed values: 21:9, 16:9, 3:2, 4:3, 1:1, 3:4, 2:3, 9:16

Optional<object>image_size

Request parameter supported by this model.

Optional<string>output_format

The format of the generated image.

Allowed values: jpeg, png

Default: png

Response Schema

The submit endpoint returns a run response. If its status is pending or running, poll GET /v1/run/{id} with the returned opaque ID until it reaches a terminal state.

stringidrequired

Opaque AGRouter run identifier. Use it exactly as returned; no prefix is guaranteed.

stringstatusrequired

Current public run status.

Allowed values: pending, running, completed, failed, timeout

Optional<string>model

Public AGRouter model name used for this run.

Optional<array<object>>outputs

Present only for completed runs. Each object is capability-specific; inspect the selected model schema for its fields.

Optional<object>error

Present only for failed or timeout runs. Contains a public error type and sanitized message.

Optional<string>error.type

Stable public error category.

Optional<string>error.message

Sanitized error message safe to show to clients.

Optional<object>usage

Usage details when available.

Model capabilities

array<string>capability_tagsrequired

Capabilities declared by the model registry.

Default: image-to-image, commercial

stringexecution_moderequired

Execution mode declared by the model registry.

Default: async

# 1. Submit a generation request
curl -X POST https://api.agrouter.ai/v1/run \
  -H "Authorization: Bearer $AGROUTER_API_KEY" \
  -H "Content-Type: application/json" \
  -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.",
  "aspect_ratio": "21:9",
  "output_format": "png"
}'

# 2. If the response is still running, poll the returned id
curl https://api.agrouter.ai/v1/run/f3d2e8a1-7c4b-4a12-9d2e-123456789abc \
  -H "Authorization: Bearer $AGROUTER_API_KEY"

Response202 Accepted

{
  "id": "f3d2e8a1-7c4b-4a12-9d2e-123456789abc",
  "model": "bytedance/seedream/4.5/edit",
  "status": "running"
}