Seedance 1 Pro Fast
seedance-1-pro-fastA faster and cheaper version of Seedance 1 Pro
- Price
- US$0.072/s
- Aspect ratios
- 16:9, 4:3, 1:1, 3:4, 9:16, 21:9, 9:21
- Duration
- 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 or 12 s
- Input โ output
- Text + Image โ Video
- Developer
- ByteDance
- Updated
- September 24, 2026
Playground
Try Seedance 1 Pro Fast
Input & output
This run
US$0.36 ยท 36 credits
Billed: 5 s
For accounts without a purchase: runs above 2 credits need a top-up.
New here?
10 free credits (US$0.10) when you sign up with Google
Usable 24 hours after sign-up, up to 5 runs per day and at most 2 credits per run. Other sign-in methods start without credits.
Examples
Prompt
high speed supercar driving on the beach at sunset
Length: 0:05
Settings
- aspect_ratio
- 16:9
- resolution
- 1080p
- duration
- 5
- fps
- 24
Prompt
high speed supercar driving on the beach at sunset
Length: 0:05
Settings
- aspect_ratio
- 16:9
- resolution
- 720p
- duration
- 5
- fps
- 24
Prompt
a tiger walks through a bamboo forest
Length: 0:05
Settings
- aspect_ratio
- 16:9
- resolution
- 480p
- duration
- 5
- fps
- 24
About Seedance 1 Pro Fast
Seedance 1 Pro Fast is a model by ByteDance in the Video generation category. On Railwail, Seedance 1 Pro Fast costs US$0.072 per second of video. Depending on the settings, the price ranges from US$0.018/s to US$0.072/s. A default run of 5 seconds costs US$0.36. Supported aspect ratios: 16:9, 4:3, 1:1, 3:4, 9:16, 21:9 and 9:21. Possible lengths: 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 or 12 s.
Pricing
| resolution: 480p | US$0.018 per second of video |
|---|---|
| resolution: 720p | US$0.030 per second of video |
| resolution: 1080pDefault | US$0.072 per second of video |
| Default run (5 s) | US$0.36 per run |
- 1 credit = US$0.01
Cost calculator
Price calculator
Total
US$36.00
3,600 credits
Per run
US$0.36 ยท 36 credits
billed as 5 s
Fixed price per run, known before the run starts.
API
curl https://railwail.com/api/v1/videos/generations \
-H "Authorization: Bearer $RAILWAIL_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "seedance-1-pro-fast",
"prompt": "A slow drone shot over a misty pine forest at sunrise"
}'
# Response: {"job_id": "...", "status": "queued", ...}
# Poll until status is completed, failed or cancelled:
curl https://railwail.com/api/v1/jobs/JOB_ID \
-H "Authorization: Bearer $RAILWAIL_API_KEY"import os
import time
import requests
API = "https://railwail.com/api/v1"
headers = {"Authorization": f"Bearer {os.environ['RAILWAIL_API_KEY']}"}
job = requests.post(
f"{API}/videos/generations",
headers=headers,
json={
"model": "seedance-1-pro-fast",
"prompt": "A slow drone shot over a misty pine forest at sunrise",
},
).json()
while True:
status = requests.get(f"{API}/jobs/{job['job_id']}", headers=headers).json()
if status["status"] in ("completed", "failed", "cancelled"):
break
time.sleep(5)
print(status["status"], status.get("output_url"))const API = "https://railwail.com/api/v1";
const headers = {
Authorization: `Bearer ${process.env.RAILWAIL_API_KEY}`,
"Content-Type": "application/json",
};
const job = await fetch(`${API}/videos/generations`, {
method: "POST",
headers,
body: JSON.stringify({
model: "seedance-1-pro-fast",
prompt: "A slow drone shot over a misty pine forest at sunrise"
}),
}).then((r) => r.json());
let status;
do {
await new Promise((r) => setTimeout(r, 5000));
status = await fetch(`${API}/jobs/${job.job_id}`, { headers }).then((r) => r.json());
} while (!["completed", "failed", "cancelled"].includes(status.status));
console.log(status.status, status.output_url);Videos run asynchronously: the first call returns a job_id; query /api/v1/jobs/JOB_ID until the status is completed.
Specifications
- Model ID
seedance-1-pro-fast- Developer
- ByteDance
- Category
- Video generation
- Input
- Text, Image
- Output
- Video
- Aspect ratios
- 16:9, 4:3, 1:1, 3:4, 9:16, 21:9, 9:21
- Duration
- 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 or 12 s
- Billing
- Fixed price, known before the run
- Catalog entry updated
- September 24, 2026
Input parameters
Inputs and settings from the model's input schema. The example in the API section shows which of them the API accepts.
promptrequiredType: TextDefault: โAllowed values: โdurationType: ChoiceDefault:5Allowed values: 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 or 12start_imageType: ImageDefault: โAllowed values: โaspect_ratioType: ChoiceDefault: โAllowed values: 16:9, 4:3, 1:1, 3:4, 9:16, 21:9 or 9:21
Tags
- replicate
- bytedance
- text-to-video
Use cases
Frequently asked questions
What is Seedance 1 Pro Fast?
Seedance 1 Pro Fast is a model by ByteDance in the Video generation category. On Railwail you can call it with an API key through the Railwail API.
How much does Seedance 1 Pro Fast cost on Railwail?
On Railwail, Seedance 1 Pro Fast costs US$0.072 per second of video. Depending on the settings, the price ranges from US$0.018/s to US$0.072/s. A default run of 5 seconds costs US$0.36. The price is known before the run starts. Usage is paid from prepaid credits; 1 credit equals US$0.01.
Which settings does Seedance 1 Pro Fast support?
According to its input schema, Seedance 1 Pro Fast knows these parameters: prompt, duration (2, 3, 4, 5, 6, 7, 8, 9, 10, 11 or 12), start_image and aspect_ratio (16:9, 4:3, 1:1, 3:4, 9:16, 21:9 or 9:21).
How fast is Seedance 1 Pro Fast?
There are not enough measured runs of Seedance 1 Pro Fast on Railwail yet to state a run time. It depends on the input, the settings and the load at the provider.
Is Seedance 1 Pro Fast better than Google Veo 3.1?
That depends on the task. Seedance 1 Pro Fast (ByteDance) and Google Veo 3.1 (Google DeepMind) are both models in the Video generation category. The comparison page shows their prices and specifications side by side.
Compare Seedance 1 Pro Fast and Google Veo 3.1Can Seedance 1 Pro Fast use an image as input?
Yes. Send the image in the start_image parameter.
How do I use Seedance 1 Pro Fast through the API?
Create a Railwail API key and send your request with the model ID seedance-1-pro-fast. Code examples for curl, Python and JavaScript are in the API section of this page.
Comparable models
All in this category- Google Veo 2Google DeepMind
Google's state-of-the-art video generation model. Simulates real-world physics with various visual styles.
- Google Veo 3 (Replicate)Google DeepMind
Google's Veo 3 served via Replicate. Text-to-video with native synchronized audio generation. High-fidelity motion and scene coherence in short clips.
- Google Veo 3.1Google DeepMind
Latest Veo with image-to-video and context-aware audio
Use Seedance 1 Pro Fast via the API
One API key for every model on Railwail. Usage is charged from prepaid credits, 1 credit = US$0.01.