ByteDance · Image API

Seedream 5.0 Lite

seedream-5-0-lite

Efficient 4K generation with accurate text, batch output, and multi-reference editing.

POST/v1/images/generations

Output count1–15

Reference imagesUp to 14

Resolution tiers2K · 3K · 4K

Generation

Generate with Seedream 5.0 Lite

Use ImgRouter's unified request contract and this model ID. The example uses recommended defaults from the route's current parameter guide.

cURL

curl https://api.imgrouter.com/v1/images/generations \
  -H "Authorization: Bearer $IMGROUTER_API_KEY" \
  -H "Content-Type: application/json" \
  -H "Idempotency-Key: seedream-5-0-lite-generate-001" \
  -d '{
  "model": "seedream-5-0-lite",
  "prompt": "Editorial product photograph, precise materials, soft studio light",
  "size": "1:1",
  "resolution": "2K",
  "n": 1,
  "output_format": "jpeg"
}'

Request body

modelstring · requiredUse seedream-5-0-lite.

promptstring · requiredGeneration or editing instruction between 1 and 5,000 characters.

sizestringSupported values: auto, 1:1, 4:3, 3:4, 16:9, 9:16, 3:2, 2:3, 2:1, 1:2, 21:9.

resolutionstringSupported values: 2K, 3K, 4K.

ninteger · 1–15Number of output images. Defaults to 1 and cannot exceed 15.

output_formatstringSupported values: jpeg, png.

reference_imagesstring[] · max 14Public HTTPS source images. Send this field to the edit endpoint.

Controls

Supported options

Aspect ratio or size

auto1:14:33:416:99:163:22:32:11:221:9

Resolution

2K3K4K

Output format

jpegpng

Route notes

Designed for multi-image and sequential generation; one request can produce up to fifteen images.

The total number of references plus requested outputs cannot exceed fifteen.

1K and 9:21 are not supported on this route.

Reference workflow

Edit with reference images

Send public HTTPS source images with the same core controls. This route accepts up to 14 reference images.

POST/v1/images/edits

cURL

curl https://api.imgrouter.com/v1/images/edits \
  -H "Authorization: Bearer $IMGROUTER_API_KEY" \
  -H "Content-Type: application/json" \
  -H "Idempotency-Key: seedream-5-0-lite-edit-001" \
  -d '{
  "model": "seedream-5-0-lite",
  "prompt": "Preserve the subject and composition. Change the scene to soft blue hour.",
  "size": "1:1",
  "resolution": "2K",
  "n": 1,
  "output_format": "jpeg",
  "reference_images": [
    "https://example.com/reference.jpg"
  ]
}'

Describe both the intended change and the details that must remain consistent. Stable source URLs produce the most reliable edit requests.

Response

Read the completed output

Successful requests return completed image URLs and a request ID. Store the assets you need permanently; routed output URLs may expire.

200 · application/json

{
  "id": "req_01K4…",
  "object": "image.generation",
  "created": 1787424152,
  "data": [
    { "url": "https://static.imgrouter.com/images/req_01K4.webp" }
  ],
  "usage": { "images": 1 }
}

Use GET /v1/requests/{request_id} for reconciliation and GET /v1/balance for the authenticated key's current Credit position.