Video model by ByteDance
Seedance 2.0 Fast API
model: seedance-2.0-fast
Call Seedance 2.0 Fast with your KeelRouter API key, the same key you use for every other model. From $0.071 per second, paid per call from a prepaid balance. Failed calls are free.
Pricing
| Option | Price |
|---|---|
| 480p | $0.071 per second |
| 720p | $0.15 per second |
Call it
Async: POST /v1/video/generations returns a taskId; poll the same path with ?task_id= or pass a callback_url.
curl https://api.keelrouter.com/v1/video/generations \
-H "Authorization: Bearer $KEELROUTER_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "seedance-2.0-fast",
"prompt": "A paper boat drifting down a rainy street, slow camera follow",
"resolution": "480p"
}'Parameters
| Name | Type | Notes |
|---|---|---|
| model | string | Required. seedance-2.0-fast |
| prompt | string | |
| resolution | string | One of 480p, 720p. Default 720p. |
| aspect_ratio | string | One of adaptive, 21:9, 16:9, 4:3, 1:1, 3:4, 9:16. Default adaptive. |
| duration | number | Range 4–15. Default 5. |
| generate_audio | boolean | Default true. |
| first_frame_url | string | |
| last_frame_url | string | |
| reference_image_urls | array | |
| reference_video_urls | array | |
| reference_audio_urls | array | |
| web_search | boolean | |
| callback_url | string | Optional https URL; we POST the result when the task ends |
FAQ
- How much does the Seedance 2.0 Fast API cost on KeelRouter?
- From $0.071 per second. You pay per call from a prepaid USD balance; failed calls are not charged.
- How do I call Seedance 2.0 Fast?
- POST to /v1/video/generations with model "seedance-2.0-fast". You get a taskId back; poll the same endpoint with ?task_id= or pass a callback_url.
- Is this the official Seedance 2.0 Fast API?
- No. KeelRouter is an independent API gateway. Requests run on Seedance 2.0 Fast through our upstream providers, and the video model keeps its own safety filters.
- How long are results kept?
- Result files are kept for 30 days, then deleted. Download what you want to keep.
More from ByteDance
KeelRouter is an independent service and is not affiliated with ByteDance. Seedance 2.0 Fast is a trademark of its owner, used here only to name the model a request runs on.