Seedream 4.5

Generate images from text or edit images using references.

POST

/api/v1/generations

Example request

Set your FLUX_API_KEY before running. See the parameters below for supported settings.

cURL

curl https://api.flux-context.org/api/v1/generations \
  -H "Authorization: Bearer $FLUX_API_KEY" \
  -H "Content-Type: application/json" \
  --data '{
  "model": "seedream-4-5",
  "input": {
    "prompt": "Editorial fashion portrait in natural light",
    "aspect_ratio": "4:5",
    "resolution": "2K",
    "max_images": 1
  }
}'

Parameters

Set model to seedream-4-5. These fields belong inside input.

Parameter	Description
`prompt` string · Required	Describe the image you want to create. Maximum 5,000 characters.
`image_urls` string[] · Optional	Public HTTPS reference images. Omit for text-to-image. Up to 14 items.
`aspect_ratio` string · Optional	Requested image proportions. `1:14:52:33:24:33:49:1616:921:9` Default: `1:1`
`resolution` string · Optional	Output resolution tier. Values are case-sensitive. `2K4K` Default: `2K`
`max_images` integer · Optional	Maximum number of output images. Range: 1–10. Default: `1`
`sequential_image_generation` string · Optional	Whether to allow sequential image generation. `disabledauto` Default: `disabled`

Reference media

Use your own publicly accessible HTTPS media URLs. Links must remain valid throughout queueing and generation. Base64 and file upload bodies are not supported by this endpoint.

Image-to-image

cURL

curl https://api.flux-context.org/api/v1/generations \
  -H "Authorization: Bearer $FLUX_API_KEY" \
  -H "Content-Type: application/json" \
  --data '{
  "model": "seedream-4-5",
  "input": {
    "prompt": "Editorial fashion portrait in natural light",
    "aspect_ratio": "4:5",
    "resolution": "2K",
    "max_images": 1,
    "image_urls": [
      "https://example.com/front.jpg",
      "https://example.com/back.jpg"
    ]
  }
}'

Credits

8 credits per requested image. Successful requests are charged for the requested count, including partial output. Confirmed failed requests are refunded.

Constraints

Reference images plus outputs must not exceed 15.

4:5 requests 1792x2240 at 2K or 3584x4480 at 4K; actual dimensions may differ.

Use returned dimensions when available.

Response

A successful submission returns HTTP 202 and a request ID. Response excerpt:

JSON

{
  "id": "REQUEST_ID",
  "model": "seedream-4-5",
  "status": "processing"
}

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