Official BytePlus partnerBuilt on BytePlus, a ByteDance company
Developer API · Official BytePlus partner
Seedance 2.0 Fast API
Seedance 2.0 Fast is the quicker, lower-cost tier of Seedance 2. It keeps the same prompt and reference format, so you can draft with Fast and render the keeper with Seedance 2.0 by changing one field. On KreatorFlow it costs $0.084 a second at 720p, paid from prepaid tokens with no subscription.
- $0.084/s at 720p
- Up to 10 s
- Up to 1080p
- model: kreator-video-fast
Price calculator
$0.45
per clip · $0.090/s · 100 clips $45.00
Text or image input. A reference video costs more; the console quotes every job before it runs. Prepaid tokens, no subscription.
On this page
Seedance 2.0 Fast API pricing
One token is $0.05. The price is quoted before a job is accepted, and tokens reserved for a job that fails go back to your balance.
| Resolution | Per second | 5 s clip | 10 s clip |
|---|---|---|---|
| 480p | $0.058 | $0.30 · 6 tokens | $0.60 · 12 tokens |
| 720p | $0.084 | $0.45 · 9 tokens | $0.85 · 17 tokens |
| 1080p | $0.183 | $0.95 · 19 tokens | $1.85 · 37 tokens |
Prices are for text or image input. A request with a reference video costs more; the console quotes the exact price before you send it. Top-ups start at $20.
Seedance 2.0 Fast API prices compared
One 5 second clip, 16:9, no video input. Each price was read on the provider's own page on the date shown.
| KreatorFlow API | $0.45 | |
|---|---|---|
| fal.aichecked 2 October 2026 | $1.21 | KreatorFlow 62% less |
| WaveSpeedAIchecked 2 October 2026 | $1.00 | KreatorFlow 55% less |
| Replicatechecked 2 October 2026 | $0.75 | KreatorFlow 40% less |
| Runwarechecked 2 October 2026 | $0.65 | KreatorFlow 30% less |
Every provider and setting is on the Seedance API price comparison.
Seedance 2.0 Fast API quickstart
Create a Seedance 2.0 Fast job, then wait for it. Set KREATORFLOW_API_KEY on your server first.
curl https://kreatorflow.ai/v1/videos \
-H "Authorization: Bearer $KREATORFLOW_API_KEY" \
-H "Content-Type: application/json" \
-H "Idempotency-Key: perfume-teaser-001" \
-d '{
"model": "kreator-video-fast",
"prompt": "slow dolly in on a glass perfume bottle on wet black stone, soft studio light, light rain",
"duration": 5,
"aspect_ratio": "9:16",
"resolution": "720p"
}'
# then poll until status is completed, failed, canceled or blocked
curl https://kreatorflow.ai/v1/jobs/JOB_ID \
-H "Authorization: Bearer $KREATORFLOW_API_KEY"import os, time, requests # pip install requests
API = "https://kreatorflow.ai/v1"
HEADERS = {"Authorization": f"Bearer {os.environ['KREATORFLOW_API_KEY']}"}
job = requests.post(
f"{API}/videos",
headers={**HEADERS, "Idempotency-Key": "perfume-teaser-001"},
json={
"model": "kreator-video-fast",
"prompt": "slow dolly in on a glass perfume bottle on wet black stone, soft studio light, light rain",
"duration": 5,
"aspect_ratio": "9:16",
"resolution": "720p",
},
timeout=60,
).json()["data"]["job"]
while job["status"] not in ("completed", "failed", "canceled", "blocked"):
time.sleep(3)
job = requests.get(f"{API}/jobs/{job['id']}", headers=HEADERS, timeout=60).json()["data"]["job"]
print(job["status"], job["providerOutputUrl"])const API = "https://kreatorflow.ai/v1";
const headers = { Authorization: `Bearer ${process.env.KREATORFLOW_API_KEY}` };
let { data } = await fetch(`${API}/videos`, {
method: "POST",
headers: { ...headers, "Content-Type": "application/json", "Idempotency-Key": "perfume-teaser-001" },
body: JSON.stringify({
model: "kreator-video-fast",
prompt: "slow dolly in on a glass perfume bottle on wet black stone, soft studio light, light rain",
duration: 5,
aspect_ratio: "9:16",
resolution: "720p",
}),
}).then((response) => response.json());
let job = data.job;
while (!["completed", "failed", "canceled", "blocked"].includes(job.status)) {
await new Promise((resolve) => setTimeout(resolve, 3000));
({ data } = await fetch(`${API}/jobs/${job.id}`, { headers }).then((response) => response.json()));
job = data.job;
}
console.log(job.status, job.providerOutputUrl);Rather not poll? Add webhook_url to the request and KreatorFlow calls it when the job finishes, signed so you can check it came from us. See AI video API webhooks and the Seedance API quickstart.
Parameters
| model | "kreator-video-fast" or "kreator-video-seedance-2-fast" |
|---|---|
| duration | 4 to 10 seconds |
| resolution | "480p", "720p", "1080p" |
| aspect_ratio | "16:9", "9:16", "1:1", "4:3", "3:4", "adaptive" |
| prompt | up to 8,000 characters |
| references | up to 9 images, 3 video clips and 3 audio clips (upload ids or public HTTPS URLs) |
| webhook_url | optional, called when the job completes, fails, is canceled or blocked |
GET /v1/models returns the same limits for every model, so your code can read them instead of hard-coding them. Every field, the job object, webhooks and error codes are in the Seedance API reference.
How to write Seedance 2.0 Fast prompts
- Keep prompts short and concrete: one subject, one action, one camera move.
- Use Fast to test motion and framing, then send the same request with kreator-video-pro for the final render.
- Vertical 9:16 at 720p is the cheapest way to test social hooks.
- Fix the seed while you compare prompt wording, so only the words change between runs.
Weak
product video of sneakers
Strong
A white sneaker spins slowly on a concrete plinth, hard side light, dust in the air, camera slowly orbits right, vertical 9:16.
More in the Seedance prompt guide.
What to use the Seedance 2.0 Fast API for
- UGC hooks and social clips
- Motion tests before a full render
- Batches of variants for A/B tests
Seedance 2.0 Fast API limitations
- Clips run from 4 to 10 seconds per request; longer videos are several clips joined in your own pipeline.
- The highest resolution is 1080p. For 4K, use Seedance 2.0 or Seedance 2.5.
- References of real people, celebrities or public figures are declined, and a declined job is not charged.
- The output link needs your API key and expires, so copy each finished file to your own storage.
- Generation takes time: poll every 10 to 15 seconds or use a webhook rather than holding a request open.
Seedance 2.0 Fast API questions
How much does the Seedance 2.0 Fast API cost?
$0.084 a second at 720p, so a 5 second clip is $0.45 (9 tokens). You pay from prepaid tokens at $0.05 each, with no subscription, and top-ups start at $20. The table above lists every resolution.
Is the KreatorFlow Seedance 2.0 Fast API cheaper than other providers?
On the published prices we checked, yes for the providers listed: a 5 second Seedance 2.0 Fast clip at 720p is $0.45 on KreatorFlow against $1.21 on fal.ai (checked 2 October 2026), 62% less. Each price was read on the provider's own page on the date shown.
Is this the official Seedance 2.0 Fast API?
It is KreatorFlow's own API, built on BytePlus, a ByteDance company. KreatorFlow is an official partner of BytePlus, a ByteDance company, and it sends your requests to Seedance 2.0 Fast through BytePlus, behind a stable KreatorFlow model alias and one KreatorFlow key.
How long can a Seedance 2.0 Fast clip be?
From 4 to 10 seconds per request, in 480p, 720p, 1080p.
How do I get a Seedance 2.0 Fast API key?
Sign in to the KreatorFlow API console, create a key on the API keys tab and top up tokens from $20. The same key works for every Seedance and Seedream model, so switching models is one field in the request.
Is there a free Seedance 2.0 Fast API?
No. The API is prepaid, so you pay only for the clips you make, from $20 with no subscription. Jobs that fail are not charged: the tokens reserved for them go back to your balance. The price calculator above shows the exact cost before you start.
Which resolutions and aspect ratios does Seedance 2.0 Fast support?
480p, 720p, 1080p, in 16:9, 9:16, 1:1, 4:3, 3:4, or adaptive to match an input image or clip.
Can I send reference images, video or audio to Seedance 2.0 Fast?
Yes: up to 9 images, 3 video clips and 3 audio clips per job, as public HTTPS URLs or upload ids from POST /v1/uploads. References must be media you own or have permission to use; a photo of a real person is declined, so register an owned character instead.
Do I have to poll, or are there webhooks?
Both work. Pass webhook_url and KreatorFlow posts a signed event when the job completes, fails, is canceled or blocked. Or poll GET /v1/jobs/{id} every 10 to 15 seconds.
What are the rate limits?
POST /v1/videos accepts 20 requests a minute per developer account and GET /v1/jobs/{id} 120 a minute. A 429 response carries a Retry-After header with the seconds to wait.
Do you train on my prompts or videos?
No. KreatorFlow does not use your private prompts or generated outputs to train AI models without your explicit opt-in.
Why use KreatorFlow instead of going to BytePlus directly?
KreatorFlow is an official partner of BytePlus, a ByteDance company, and it adds one key for every Seedance and Seedream model, prepaid card top-ups from $20, per-second prices, uploads for references, signed webhooks and idempotent requests, with no enterprise sign-up.
Start with the Seedance 2.0 Fast API
Create a key, top up from $20 and send your first Seedance 2.0 Fast job in minutes.