seedream-5.0

Seedream 5.0 text-to-image and image-to-image API.

Use doubao-seedream-5-0-260128 with the same synchronous endpoint for text-to-image and image-to-image generation.

Text 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-5-0-260128",
    "prompt": "A serene mountain landscape at sunrise with misty valleys",
    "size": "2048x2048",
    "seed": 42,
    "watermark": false,
    "logo_info": { "add_logo": false }
  }'

model · string · required

Must be doubao-seedream-5-0-260128.

prompt · string · required

The image-generation prompt.

size · string

Output size such as 2048x2048 or 2K.

watermark · boolean · default: false

Whether to add a watermark.

seed · integer

Random seed.

logo_info · object

Custom logo watermark settings.

logo_info.add_logo · boolean

Whether to add a logo.

logo_info.position · integer

Logo position.

logo_info.language · integer

Logo language.

logo_info.opacity · number

Logo opacity.

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-5-0-260128",
    "prompt": "Create three coherent images of a girl and a cow doll riding a roller coaster",
    "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
  }'

model · string · required

Must be doubao-seedream-5-0-260128.

prompt · string · required

The image-editing instruction.

image · string[] · required

Reference image URLs.

sequential_image_generation · string

Set to auto for sequential image generation.

sequential_image_generation_options.max_images · integer

Maximum output count.

size · string

Output size such as 2048x2048 or 2K.

watermark · boolean · default: false

Whether to add a watermark.

seed · integer

Random seed.

logo_info · object

Custom logo watermark settings.

If the upstream service takes more than 10 seconds to download an external image, the request may time out. Use stable image URLs or Base64 data URIs.

Supported sizes

The documented explicit sizes are 2048x2048, 1728x2304, 2304x1728, 2848x1600, 1600x2848, 2496x1664, 1664x2496, 3136x1344, 3072x3072, 2592x3456, 3456x2592, 4096x2304, 2304x4096, 2496x3744, 3744x2496, and 4704x2016.

Headers

Authorization · string · required

Bearer authentication in the form Bearer <token>.

Content-Type · string · default: "application/json" · required

Request body format.

Response

200

{
  "model": "doubao-seedream-5-0-260128",
  "created": 1775029815,
  "data": [{
    "url": "https://example.com/generated-image.png",
    "size": "2048x2048"
  }],
  "usage": {
    "generated_images": 1,
    "output_tokens": 16384,
    "total_tokens": 16384
  }
}

model · string

The model ID used for the request.

created · integer

Creation time as a Unix timestamp in seconds.

data · object[]

Generated images.

data[].url · string

Generated image URL.

data[].size · string

Generated image dimensions.

usage.generated_images · integer

Number of generated images.

usage.output_tokens · integer

Output token count.

usage.total_tokens · 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.