Seedance 2 Fast
ByteDance's Seedance 2 Fast is the quick, lower-cost tier of Seedance 2 — cinematic text-to-video with synchronized audio at a cheaper per-second rate. Pick any duration from 4 to 15 seconds at 480p or 720p, with audio included in the price, and iterate faster than on the full model.
76% less than the priciest provider (7 compared). Same model, same output.
Duration
Duration of the video in seconds (4-15). Billed per second.
Resolution
Video resolution. Higher resolutions cost more per second.
Aspect Ratio
Aspect ratio of the generated video. 'adaptive' follows the prompt or the primary media.
Audio
Synchronized audio: voice, sound effects and music generated in the same pass. Some sellers cannot switch audio off, so turning it off can change the winning price.
Content
What the video contains. Sellers differ in what they allow: 'general' (no faces) can unlock lower prices; 'mature' routes only to sellers without content restrictions.
76% less than the priciest provider (7 compared). Same model, same output.
Your result renders here.
Use Seedance 2 Fast via the API
Generate with Seedance 2 Fast from your own code. Async by design: submit a generation, get a run id back instantly, poll until it completes. Billed in credits at the best available provider price — from $0.09 per second, audio included.
1 — Start a generation
curl -X POST https://app.scenetra.com/api/v1/generate/seedance-2-t2v-fast \
-H "Authorization: Bearer YOUR_API_KEY" \
-H "Content-Type: application/json" \
-d '{"prompt":"Handheld follow shot of a street food vendor flipping noodles in a wok at night, steam and sparks, neon signs behind, sizzling and crowd chatter","duration":"5","resolution":"720p"}'Response (202)
{
"runId": "run_abc123",
"status": "PENDING",
"model": "seedance-2-t2v-fast",
"estimatedCredits": 293,
"statusUrl": "/api/v1/runs/run_abc123"
}2 — Poll until COMPLETED (every 2-5 seconds)
curl https://app.scenetra.com/api/v1/runs/run_abc123 \
-H "Authorization: Bearer YOUR_API_KEY"Response
{
"runId": "run_abc123",
"status": "COMPLETED",
"progress": { "completed": 1, "total": 1 },
"outputs": [
{ "type": "video", "url": "https://images.scenetra.com/..." }
],
"error": null,
"estimatedCredits": 293
}Request fields
| Field | Type | Description | Default |
|---|---|---|---|
| prompt* | string | Describe the video: subject, action, camera work, and any dialogue or sound direction. | — |
| duration | string | Duration of the video in seconds (4-15). Billed per second.4 · 5 · 6 · 7 · 8 · 9 · 10 · 11 · 12 · 13 · 14 · 15 | 5 |
| resolution | string | Video resolution. Higher resolutions cost more per second.480p · 720p | 720p |
| aspect_ratio | string | Aspect ratio of the generated video. 'adaptive' follows the prompt or the primary media.adaptive · 21:9 · 16:9 · 4:3 · 1:1 · 3:4 · 9:16 | adaptive |
| generate_audio | string | Synchronized audio: voice, sound effects and music generated in the same pass. Some sellers cannot switch audio off, so turning it off can change the winning price.false · true | true |
| subject_content | string | What the video contains. Sellers differ in what they allow: 'general' (no faces) can unlock lower prices; 'mature' routes only to sellers without content restrictions.general · people · mature | people |
| callbackUrl | string (https URL) | Optional. When the run finishes (completed or failed), we POST the final run status to this URL — same shape as the poll response, plus model, params, and chargedCredits. Best-effort; polling remains the source of truth. | |
Unknown fields are rejected with a helpful 400. Media fields take https URLs. There is no provider parameter — every run is routed to the cheapest capable provider automatically.
Good to know
Billing
Runs bill your account credits at provider cost with 0% markup. The submit response includes the credit estimate; failed generations are refunded automatically. Add ?dryRun=1 to get the estimate without running anything.
Errors
Errors are always { "error": { "code", "message" } } with stable codes: unauthorized, model_not_available, invalid_parameter, insufficient_credits, rate_limited. A failed run is not an HTTP error — poll responses report status: "FAILED" with the reason.
What makes Seedance 2 Fast different
The iteration tier of Seedance 2
Seedance 2 Fast is the same cinematic Seedance 2.0 family tuned for speed and cost: roughly 20% cheaper per second than the full model at both 480p and 720p, with quicker turnaround. It's built for the exploratory phase — trying prompts, blocking shots, testing motion — where you generate ten clips to keep one.
Synchronized audio at no extra cost
Like its bigger sibling, Fast generates voice, sound effects, and background music together with the picture in a single pass — and the per-second price is identical with audio on or off. Leave the toggle on for sound-on drafts, or flip it off for silent footage; either way you pay the same rate.
4 to 15 seconds, priced per second
Choose any whole-second duration from 4 to 15 and pay only for what you generate: a 5-second 480p draft is about $0.45, a 10-second one about $0.90. Aspect ratios run from 21:9 cinematic wide to 9:16 vertical, or stay on Auto and let the prompt decide the frame.
Draft on Fast, finish on Seedance 2
Fast caps at 720p, while the full Seedance 2 adds a 1080p super-resolution tier. On a Scenetra board the two sit side by side: iterate your prompt on a Seedance 2 Fast node until the shot works, then paste the winning prompt into a Seedance 2 node for the full-quality 1080p final — same settings, same canvas.
Parameters
| Parameter | Type | Description | Default |
|---|---|---|---|
| Prompt* | text | Text prompt describing the video to generate. | — |
| Duration | select | Duration of the video in seconds (4-15).4 · 5 · 6 · 7 · 8 · 9 · 10 · 11 · 12 · 13 · 14 · 15 | 5 |
| Resolution | select | Video resolution. Higher resolutions cost more per second.480p · 720p | 720p |
| Aspect Ratio | select | Aspect ratio of the generated video, or 'Auto' to let the model choose from prompt context.Auto · 21:9 · 16:9 · 4:3 · 1:1 · 3:4 · 9:16 | Auto |
| Generate Audio | select | Whether to generate synchronized audio — voice, sound effects, and music — with the video.false · true | true |
| Content | select | What your video contains. 'No faces' can unlock lower prices; 'Mature' relaxes content restrictions.No faces · Faces · Mature | Faces |
Pricing
From $0.09 per second, audio included
Pay per generation — only pay for what you use.
480p
$0.09/s
per second
720p
$0.20/s
per second
What a video costs
| Duration | 480p | 720p |
|---|---|---|
| 5 seconds | $0.45 | $0.98 |
| 10 seconds | $0.90 | $1.94 |
Use cases
Rapid prototyping
- Prompt exploration at 480p
- Shot blocking and previz
- Motion tests before finals
- A/B concept batches
Social content
- Vertical 9:16 clips
- Sound-on hooks
- Trend-reactive videos
- High-volume posting schedules
Marketing & ads
- Ad concept testing
- UGC-style spots
- Campaign variant batches
- Storyboard animatics
Film & storytelling
- Scene drafts with dialogue
- Establishing shot sketches
- Beat-by-beat story tests
- Mood and lighting studies
Frequently asked questions
What is Seedance 2 Fast?+
Seedance 2 Fast is the quick, lower-cost tier of ByteDance's Seedance 2.0 video model. It generates cinematic clips from text prompts — 4 to 15 seconds at 480p or 720p — with synchronized audio included, at a cheaper per-second rate and faster turnaround than the full Seedance 2. On Scenetra it comes in three modes: Text to Video, Image to Video, and Reference to Video.
How much does Seedance 2 Fast cost?+
On Scenetra, about $0.09 per second at 480p and $0.20 per second at 720p, audio included. A 5-second 480p clip is about $0.45; 10 seconds at 720p is about $1.94. Billing is pay-per-generation from your credit balance — every model is billed at provider cost with 0% markup, and there's no subscription gating the model.
What's the difference between Seedance 2 Fast and Seedance 2?+
Fast is the iteration tier: roughly 20% cheaper per second (about $0.09/s vs $0.11/s at 480p, $0.20/s vs $0.24/s at 720p) and quicker to generate, but it tops out at 720p, while the full Seedance 2 adds a 1080p super-resolution tier. Both are on Scenetra, so a common pattern is drafting on Fast and re-running the winning prompt on Seedance 2 for the 1080p final.
Does Seedance 2 Fast generate audio?+
Yes — audio is on by default. The model generates synchronized voice, sound effects, and background music together with the picture, and the per-second price is the same whether audio is on or off. Toggle it off if you need silent footage.
Can I try Seedance 2 Fast for free?+
Seedance 2 Fast is a paid model: about $0.45 per 5-second 480p clip. On Scenetra it's pure pay-per-generation with nothing recurring to cancel.
What durations and aspect ratios does Seedance 2 Fast support?+
Any whole-second duration from 4 to 15 seconds, billed per second. Aspect ratios span 21:9, 16:9, 4:3, 1:1, 3:4, and 9:16, plus an Auto mode that picks a frame based on your prompt.
When should I use Fast instead of Seedance 2 Mini?+
Both are cheaper Seedance tiers on Scenetra. Fast is a lower-cost, quicker cut of the full Seedance 2.0 generation, while Mini is its own compact model tuned for the lowest cost per second. If you want output closest to full Seedance 2 for drafting, use Fast; if minimum spend per clip matters most, compare it against Mini on the same board — running one prompt through both takes seconds.
Related models
Seedance 2
ByteDance's Seedance 2.0 generates cinematic videos from text prompts with synchronized audio — voice, sound effects, and background music. Pick any duration from 4 to 15 seconds and resolutions up to 1080p, with per-second pricing that keeps 480p drafting cheap.
View model →Seedance 2 Mini
ByteDance's Seedance 2 Mini is the fast, lower-cost tier of Seedance 2 — generating cinematic videos from text prompts with synchronized audio. Mini delivers the same audio-visual sync at a fraction of the price, ideal for rapid iteration and high-volume social content.
View model →Seedance 2.5
ByteDance's Seedance 2.5 generates cinematic videos up to 30 seconds from text prompts with synchronized audio — voice, sound effects, and background music — built in by default. The newest Seedance generation, with mp4 or high-fidelity mov output for multi-round editing pipelines.
View model →Start creating with Seedance 2 Fast
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