A faster multimodal Seedance route with text, endpoint frames, optional references, generated audio, and 480p/720p output.
Provider: ByteDance
Category: video generation
Endpoint: /v1/tasks
Status: Available
Cost: See live page pricing
ByteDance Seedance 2.0 Fast: high-speed video generation with native audio. Text-to-video, image-to-video (first/last frame), and multimodal reference-to-video (image/video/audio). 480p/720p, 4-15s.
Pricing
Standard Usage
Use images to control the first and last frame.
Upload the first-frame image. Supports JPG/PNG/WebP/GIF, max 10MB
Upload the last-frame image. Supports JPG/PNG/WebP/GIF, max 10MB
Choose 4-15 seconds in 1-second steps
Upload reference audio files
Upload reference videos
Generate synchronized audio for the video
Use web search signals for generation
Ready for generation
Configure your parameters and click "Run" to see the output here.
Public model preview
Use this model preview to inspect the output format, subject motion, camera movement, and scene continuity.
A faster multimodal Seedance route with text, endpoint frames, optional references, generated audio, and 480p/720p output.
Prompt shown with this public preview
A cheetah at full gallop across golden grassland at sunset, powerful muscles rippling, cinematic tracking shot
Choose by input method, output specifications, control surface, and budget.
Long-form video
Generate up to 30 seconds with seven aspect ratios and synchronized audio.
A faster multimodal Seedance route with text, endpoint frames, optional references, generated audio, and 480p/720p output.
Start with a text-only task, or add endpoint frames and references only when they have a clear role in the shot. seedance-2.0-fast
These specifications reflect the current HiAPI Seedance 2.0 Fast request contract.
Choose one control mode for the first test, then add references gradually to keep the request explainable.
This is the minimum request for an asynchronous text-to-video task. Use the API docs for task retrieval, callbacks, errors, and the complete parameter contract.
curl -X POST "https://api.hiapi.ai/v1/tasks" \
-H "Authorization: Bearer YOUR_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "seedance-2.0-fast",
"input": {
"prompt": "A cheetah at full gallop across golden grassland at sunset, powerful muscles rippling, cinematic tracking shot",
"duration": 5,
"resolution": "720p",
"aspect_ratio": "16:9",
"generate_audio": true
}
}'It is prompt-led and can also use endpoint frames or image, video, and audio references according to the active contract.
4-15 seconds, 480p, 720p, and 1:1, 4:3, 3:4, 16:9, 9:16, 21:9, adaptive.
Optional image, video, and audio references; generated audio
Billing follows output duration and the live tier. Resolution, mode, or audio differences are reflected by the page price and task record.
POST an asynchronous task to /v1/tasks with model set to seedance-2.0-fast and place parameters inside input.
Lead with subject and setting, then describe action, camera direction, and speed in time order. State no cuts for a continuous take.
Draft
5s · 720p
Final
15s · 720p
Validate subject motion and camera continuity with 5s · 720p, then move to 15s · 720p.
Check motion stability and subject consistency online, then create an asynchronous task with the same model ID: seedance-2.0-fast.