Doubao-Seedance 2.0 Fast — Text to Video


Model ID	`bytedance/seedance-2-fast-t2v`
Family	`seedance-2-fast`
Task	`text-to-video`
Modality	Video
Upstream	ByteDance Doubao-Seedance 2.0 (Fast)

The Fast tier is accelerated and lower-cost but supports 720p only — resolution: "1080p" is rejected. Use the Standard model for 1080p.

Endpoint

POST https://routerbase.com/v1/videos/generations

Async — returns {id, status: "pending"}; poll GET /v1/videos/generations/{id} until success or failed.

Parameters

string

required

Text prompt describing the video. Max 5000 characters.

"720p"

default:"\"720p\""

Fast is 720p-only.

string

default:"\"16:9\""

Aspect ratio: 16:9, 9:16, 1:1, 4:3, 3:4, 21:9.

integer

default:"5"

Clip length in seconds. Range [3, 12].

integer

Reproducibility seed. Range [0, 2147483647].

Example

curl https://routerbase.com/v1/videos/generations \
  -H "Authorization: Bearer $ROUTERBASE_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "bytedance/seedance-2-fast-t2v",
    "prompt": "a calm beach at sunrise, cinematic",
    "duration": 5
  }'

Get Started

API Reference

Doubao-Seedance 2.0 Fast — Text to Video

Endpoint

Parameters

Example

See also

​Endpoint

​Parameters

​Example

​See also

Endpoint

Parameters

Example

See also