Seedance 2.0 Fast
ByteDanceAvailableByteDance's Seedance 2.0 Fast: 4 to 15 second clips at 480p or 720p with optional audio, billed per second of output.
- Text → video
- Image → video
- Optional audio
480p
77 cr / second
$0.077
720p
161 cr / second
$0.161
- Queued
- Processing
- Succeeded
What Seedance 2.0 Fast is good for
Longer drafts
Clips run up to 15 seconds, and 480p costs less per second than 720p, which suits rough cuts.
Wide and unusual frames
Choose from 16:9, 9:16, 1:1, 4:3, 3:4, 21:9 or adaptive.
Detailed shot descriptions
Prompts can run to 20,000 characters, so you can describe a shot in detail.
Input parameters
JSON Schema| Name | Type | Default | Description |
|---|---|---|---|
| prompt (required) | string | — | What happens in the shot, including motion and sound. 3 to 20,000 characters. |
| image_urls | string[] | — | First frame, and optionally last frame, as public HTTPS URLs. |
| duration | integer | 5 | Clip length in seconds. 4 to 15. Sets the price. |
| resolution | enum | "720p" | Output resolution. One of 480p, 720p. Sets the price. |
| aspect_ratio | enum | "16:9" | Output aspect ratio. One of 16:9, 9:16, 1:1, 4:3, 3:4, 21:9, adaptive. |
| generate_audio | boolean | true | Also generate sound for the video. |
Fields of the input object. Unknown fields are rejected with 400 invalid_request.
curl -X POST https://genkiln.com/v1/tasks \
-H "Authorization: Bearer $GENKILN_API_KEY" \
-H "Content-Type: application/json" \
-H "Idempotency-Key: $(uuidgen)" \
-d '{
"model": "seedance-2.0-fast",
"input": {
"prompt": "A red fox trotting through fresh snow at dawn, low tracking shot, soft breath vapor",
"duration": 5,
"resolution": "720p",
"aspect_ratio": "16:9",
"generate_audio": true
}
}'
# 202 Accepted -> { "id": "task_...", "status": "queued", "cost_credits": ... }
curl https://genkiln.com/v1/tasks/task_... \
-H "Authorization: Bearer $GENKILN_API_KEY"The samples use the values in the Playground form. Create a task, then poll it until it is final, or add callback_url to get a signed webhook.
Seedance 2.0 Fast API pricing
| Variant | Credits | USD | 10-second clip |
|---|---|---|---|
| 480p | 77 | $0.077 | $0.770 |
| 720p | 161 | $0.161 | $1.610 |
The cost is set by the parameters you send and returned as cost_credits when the task is created. 1 credit = US$0.001. Buy credits
Seedance 2.0 Fast questions
Compare with similar models
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VideoVeo 3.1 Lite
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A flat price per clip of up to 8 seconds, with audio in every output.
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