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02
Examples
Real outputs from the public examples of this model on Replicate, with the prompt and settings that produced them. They were not generated live on this page.
Prompt
The sun rises slowly between tall buildings. [Ground-level follow shot] Bicycle tires roll over a dew-covered street at dawn. The cyclist passes through dappled light under a bridge as the entire city gradually wakes up.
Længde: 0:05
Settings
aspect_ratio
16:9
resolution
1080p
duration
5
fps
24
Prompt
A skier glides over fresh snow, kicking up large clouds of snow as he turns. Accelerating gradually down the slope, the camera moves smoothly alongside.
Længde: 0:05
Settings
aspect_ratio
16:9
resolution
1080p
duration
5
fps
24
Eksempelprompts
Eksempler fra Railwail-kataloget. De blev ikke genereret live på denne side.
Product
Længde: 0:05
Smartphone rotating with reflections
03
Om Seedance Pro
Kort sagtFra 23. september 2026
Seedance Pro er en model af ByteDance i kategorien Videogenerering. På Railwail koster Seedance Pro 0,18 US$ pr. videosekund. Afhængigt af indstillingerne ligger prisen mellem 0,036 US$/s og 0,18 US$/s. En standardkørsel på 5 sekunder koster 0,90 US$. Understøttede billedformater: 16:9, 9:16 og 1:1. Mulige længder: 5 eller 10 s.
Baggrund
Om ByteDance Seed
Grundlagt 2023 · Beijing, China
ByteDance Seed is the foundation-model research arm of ByteDance, the company behind TikTok, Douyin and CapCut. Formed in 2023 and led by Wu Yonghui, Seed ships the Doubao consumer assistant, the Skylark / Doubao LLM family, the Seedream image model and the Seedance video model. Seedance launched in early 2025 with two tiers: Seedance Pro (high-fidelity) and Seedance Lite (fast). The Pro tier targets advertising, e-commerce and film-style use cases, with longer durations, higher resolution and richer cinematic controls than Lite. ByteDance also expose Seedance through the Doubao API, the CapCut Pro creator suite and selected enterprise integrations.
Diffusion Transformer (DiT) with 3D spatio-temporal VAE
Seedance Pro is a closed Diffusion Transformer operating on a 3D spatio-temporal Variational Autoencoder. The denoiser uses full 3D attention with bilingual text conditioning from ByteDance's Doubao / Skylark LLM family and optional image embeddings for first-frame, end-frame and subject-reference modes. The Pro tier is positioned for high-fidelity creative work and supports 5-10 second clips at 1080p / 24-30 fps with extension chains for longer sequences. Cinematic control vocabulary covers lens choice, camera moves and shot scale. Training uses a curated multilingual video corpus drawn in part from ByteDance's privileged access to TikTok / Douyin platform data, with synthetic dense bilingual captions and reward-model post-training tuned for aesthetic quality and prompt fidelity. Public independent benchmarks (Artificial Analysis, etc.) consistently rank Seedance Pro in the top tier of Chinese video models alongside Kling v3.
Parametre
Undisclosed
Funktioner
Text-to-video, image-to-video and subject-reference modes
5-10 second clips at 1080p / 24-30 fps natively
Extension chains for longer sequences
Rich cinematographic prompt vocabulary
Strong prompt adherence on complex compositions
Bilingual Chinese/English prompts
Available via Doubao API, CapCut Pro and enterprise integrations
Frequently top-ranked among Chinese video models in public leaderboards
Best for: ad creative, e-commerce, cinematic shorts, branded content.
Træning og licens
Closed multi-billion-clip corpus including licensed video, web video and ByteDance platform data with bilingual dense captions; exact size undisclosed.
Licens: Proprietary commercial licence via Doubao / ByteDance Seed terms; commercial use on paid plans.
Sikkerhedstests: NSFW, CSAM, public-figure and politically sensitive content filters per CAC algorithmic-content rules; stricter on Chinese surfaces.
Kendte begrænsninger
5-10 second clip limit per generation
No native audio in current version
Heavy political and public-figure moderation in China
curl https://railwail.com/api/v1/videos/generations \
-H "Authorization: Bearer $RAILWAIL_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "seedance-pro",
"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-pro",
"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-pro",
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);
Seedance Pro er en model fra ByteDance i kategorien Videogenerering. På Railwail kan du kalde den med en API-nøgle via Railwail API.
Hvad koster Seedance Pro på Railwail?
På Railwail koster Seedance Pro 0,18 US$ pr. videosekund. Afhængigt af indstillingerne ligger prisen mellem 0,036 US$/s og 0,18 US$/s. En standardkørsel på 5 sekunder koster 0,90 US$. Prisen kendes før kørslen starter. Forbrug betales fra forudbetalte credits; 1 credit svarer til 0,01 US$.
Hvilke indstillinger understøtter Seedance Pro?
Ifølge dens inputskema kender Seedance Pro disse parametre: prompt, duration (5 eller 10), end_image, start_image og aspect_ratio (16:9, 9:16 eller 1:1).
Hvor hurtig er Seedance Pro?
Der er endnu ikke nok målte kørsler af Seedance Pro på Railwail til at angive en udførelsestid. Det afhænger af inputtet, indstillingerne og belastningen hos provideren.
Er Seedance Pro bedre end Google Veo 3.1?
Det afhænger af opgaven. Seedance Pro (ByteDance) og Google Veo 3.1 (Google DeepMind) er begge modeller i kategorien Videogenerering. Sammenligningssiden viser deres priser og specifikationer side om side.
Opret en Railwail API-nøgle og send din anmodning med model-ID'en seedance-pro. Kodeeksempler til curl, Python og JavaScript findes i API-sektionen på denne side.
