seedream-4.5

Use doubao-seedream-4-5-251128 with the same synchronous endpoint for text-to-image and image-to-image generation.

Select the Special-Ns resource group for specific content requests.

Text to image
Image to image

Create an image

POST /v1/images/generations

cURL

curl --request POST \
  --url https://www.anyfast.ai/v1/images/generations \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '{
    "model": "doubao-seedream-4-5-251128",
    "prompt": "A serene mountain landscape at sunrise with misty valleys",
    "size": "2048x2048",
    "seed": 42,
    "watermark": false,
    "logo_info": {"add_logo": false}
  }'

string

required

Must be doubao-seedream-4-5-251128.

string

required

Text prompt for image generation.

string

Output image size.

boolean

default:false

Whether to add a watermark.

integer

Random seed.

object

Custom logo and watermark configuration.

boolean

Whether to add a logo.

integer

Logo position.

integer

Logo language.

number

Logo opacity from 0 to 1.

Create an image

POST /v1/images/generations

cURL

curl --request POST \
  --url https://www.anyfast.ai/v1/images/generations \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '{
    "model": "doubao-seedream-4-5-251128",
    "prompt": "Create three coherent amusement-park images from both references",
    "image": ["https://example.com/ref1.png", "https://example.com/ref2.png"],
    "sequential_image_generation": "auto",
    "sequential_image_generation_options": {"max_images": 3},
    "size": "2K",
    "watermark": false
  }'

string

required

Must be doubao-seedream-4-5-251128.

string

required

Image generation or editing prompt.

string[]

required

Reference image URLs.

string

Set to auto to generate an image batch.

integer

Maximum number of generated images.

string

Output image size.

boolean

default:false

Whether to add a watermark.

integer

Random seed.

object

Custom logo and watermark configuration.

Supported sizes

2048x2048, 1728x2304, 2304x1728, 2848x1600, 1600x2848, 2496x1664, 1664x2496, 3136x1344, 4096x4096, 3520x4704, 4704x3520, 5504x3040, 3040x5504, 3328x4992, 4992x3328, and 6240x2656.

Headers

string

required

Bearer authentication in the form Bearer <token>.

string

default:"application/json"

required

Request body format.

Response

200

{
  "model": "doubao-seedream-4-5-251128",
  "created": 1775029815,
  "data": [{"url": "https://example.com/generated-image.png", "size": "2048x2048"}],
  "usage": {"generated_images": 1, "output_tokens": 16384, "total_tokens": 16384}
}

string

Model used for generation.

integer

Creation time as a Unix timestamp in seconds.

object[]

Generated image list.

string

Generated image URL.

string

Generated image dimensions.

integer

Number of generated images.

integer

Output token count.

integer

Total token count.

Error responses

401 Unauthorized — The API key is missing or invalid.
429 Rate limit exceeded — The request exceeded the applicable rate limit.

Overview

Native Compatible Endpoints

Model APIs

Create an image

Create an image

Supported sizes

Headers

Response

Error responses

​Create an image

​Create an image

​Supported sizes

​Headers

​Response

​Error responses

Create an image

Create an image

Supported sizes

Headers

Response

Error responses