Try Seedream 4.0 in the Workbench
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bytedance-seedream-4
ByteDance Seedream 4.0 generates images from a text prompt, with single-image and multi-reference image-to-image editing. Supports 1K, 2K, and 4K output resolutions and batch generation.
Example request
- Sync
- Async
- Async with SSE
See the image editing reference for more details.
- Minimal
- Basic parameters
- All parameters
Fetch model details
The models endpoint returns the full model object, including itsjson_request_schema.
Request parameters
Required parameters
| Field | Type | Default | Description |
|---|---|---|---|
prompt | string | — | Text prompt for image generation. Recommended length <=600 English words. |
Optional parameters
| Field | Type | Default | Description |
|---|---|---|---|
input_image | string | — | Optional URL of a single reference image for image-to-image generation. Format: uri. |
input_images | array<string> | — | Optional list of reference image URLs for multi-reference editing. Up to 14 images. |
size | string | "2K" | Image resolution. Accepts 1K, 2K, or 4K presets, or explicit WxH pixel dimensions. One of: 1K, 2K, 4K. |
output_format | string | "jpeg" | Output image format. One of: jpeg. |
watermark | boolean | false | Whether to add an ‘AI generated’ watermark. |