Seedance 1.0 Pro Fast is the fastest, lowest-priced entry in the Seedance video line on BytePlus ModelArk, generating silent video from text prompts or a single first-frame image.
- Input
- text image
- Output
- video $1/M
Price in context
Where the price sits among 5 comparable models
The bar shows how this model’s price compares with every other model of the same kind on Synthorai. The cheapest and the most expensive are named at each end. These are base rates; batch, region and cache-write discounts are on the pricing page.
Specs & limits
Video
| Resolution | 480p / 720p / 1080p A fixed set of options, not a range. |
|---|---|
| Clip length | 2-12 s A continuous range, not a fixed set. |
| Frame rate | 24 fps |
| Aspect ratios | 6 (incl. 16:9, 9:16, 1:1) |
| Video inputs | text-to-video · first-frame image-to-video (no last-frame) |
| Format | .mp4 |
Model
| Modalities | text + image → video |
|---|
- Fastest, lowest-price Seedance tier (silent output only): text-to-video + first-frame image-to-video (no last-frame input) at 480p/720p/1080p, 24 fps, 2-12 s, six aspect ratios, .mp4
- version date 251015 encoded in the model id
Use Seedance 1.0 Pro Fast in 30 seconds
Asynchronous job API: create a task and poll it, or hold the request open with Prefer: wait. POST /v1/videos
import time
import requests
BASE = "https://synthorai.io/v1"
HEADERS = {"Authorization": "Bearer sk-syn-..."}
# 1) create the video generation job (POST /v1/videos)
task = requests.post(
f"{BASE}/videos",
headers=HEADERS,
json={
"model": "seedance-1-0-pro-fast-251015",
"prompt": "a watercolor lighthouse at dawn, waves rolling in, camera pulling back",
"resolution": "720p",
"duration": 5,
},
).json()
# 2) poll the job until it reaches a terminal state
while task["status"] in ("queued", "in_progress"):
time.sleep(5)
task = requests.get(f"{BASE}/videos/{task['id']}", headers=HEADERS).json()
# 3) completed → signed video URL (valid ~24h - download and store it promptly)
if task["status"] == "completed":
print(task["data"][0]["url"])
else:
print(task["error"])const HEADERS = {
Authorization: "Bearer sk-syn-...",
"Content-Type": "application/json",
};
interface VideoTask {
id: string;
status: "queued" | "in_progress" | "completed" | "failed" | "cancelled";
data?: Array<{ url: string }>;
error?: { code: string; message: string };
}
// 1) create the video generation job (POST /v1/videos)
const created = await fetch("https://synthorai.io/v1/videos", {
method: "POST",
headers: HEADERS,
body: JSON.stringify({
model: "seedance-1-0-pro-fast-251015",
prompt: "a watercolor lighthouse at dawn, waves rolling in, camera pulling back",
resolution: "720p",
duration: 5,
}),
});
let task = (await created.json()) as VideoTask;
// 2) poll the job until it reaches a terminal state
while (task.status === "queued" || task.status === "in_progress") {
await new Promise((r) => setTimeout(r, 5000));
const res = await fetch(`https://synthorai.io/v1/videos/${task.id}`, { headers: HEADERS });
task = (await res.json()) as VideoTask;
}
// 3) completed → signed video URL (valid ~24h — download and store it promptly)
if (task.status === "completed") console.log(task.data?.[0]?.url);
else console.error(task.error);# Create the job; "Prefer: wait" holds the request up to 60s and returns the
# completed task when generation finishes in time (else the queued task).
curl https://synthorai.io/v1/videos \
-H "Authorization: Bearer sk-syn-..." \
-H "Content-Type: application/json" \
-H "Prefer: wait=60" \
-d '{
"model": "seedance-1-0-pro-fast-251015",
"prompt": "a watercolor lighthouse at dawn, waves rolling in, camera pulling back",
"resolution": "720p",
"duration": 5
}'
# Still queued / in_progress? Poll until completed → data[0].url (valid ~24h).
curl https://synthorai.io/v1/videos/vid_9f2e8c1a4b7d \
-H "Authorization: Bearer sk-syn-..."package main
import (
"bytes"
"encoding/json"
"fmt"
"net/http"
"time"
)
const base = "https://synthorai.io/v1"
type videoTask struct {
ID string `json:"id"`
Status string `json:"status"`
Data []struct {
URL string `json:"url"`
} `json:"data"`
}
func call(method, url string, body []byte) (t videoTask) {
req, _ := http.NewRequest(method, url, bytes.NewReader(body))
req.Header.Set("Authorization", "Bearer sk-syn-...")
req.Header.Set("Content-Type", "application/json")
resp, _ := http.DefaultClient.Do(req)
defer resp.Body.Close()
json.NewDecoder(resp.Body).Decode(&t)
return t
}
func main() {
// 1) create the video generation job (POST /v1/videos)
payload, _ := json.Marshal(map[string]any{
"model": "seedance-1-0-pro-fast-251015",
"prompt": "a watercolor lighthouse at dawn, waves rolling in, camera pulling back",
"resolution": "720p",
"duration": 5,
})
task := call("POST", base+"/videos", payload)
// 2) poll the job until it reaches a terminal state
for task.Status == "queued" || task.Status == "in_progress" {
time.Sleep(5 * time.Second)
task = call("GET", base+"/videos/"+task.ID, nil)
}
// 3) completed → signed video URL (valid ~24h — download and store promptly)
if task.Status == "completed" {
fmt.Println(task.Data[0].URL)
}
}import java.net.URI;
import java.net.http.HttpClient;
import java.net.http.HttpRequest;
import java.net.http.HttpResponse;
// JDK built-in HttpClient — no extra dependency needed.
HttpClient http = HttpClient.newHttpClient();
// 1) create the job; "Prefer: wait=60" holds the request up to 60s and
// returns the completed task when generation finishes in time
HttpRequest create = HttpRequest.newBuilder(URI.create("https://synthorai.io/v1/videos"))
.header("Authorization", "Bearer sk-syn-...")
.header("Content-Type", "application/json")
.header("Prefer", "wait=60")
.POST(HttpRequest.BodyPublishers.ofString("""
{"model": "seedance-1-0-pro-fast-251015",
"prompt": "a watercolor lighthouse at dawn, waves rolling in, camera pulling back",
"resolution": "720p", "duration": 5}"""))
.build();
String task = http.send(create, HttpResponse.BodyHandlers.ofString()).body();
System.out.println(task); // {"id":"vid_…","status":…} — completed → data[0].url
// 2) still queued / in_progress? Poll GET https://synthorai.io/v1/videos/{id} until the
// status turns completed, then download data[0].url (valid ~24h).About Seedance 1.0 Pro Fast
- BytePlus describes it as a full-scale model delivering top performance at low cost, with generation up to three times faster than Seedance 1.0 Pro.
- It produces .mp4 clips at 480p, 720p, or 1080p, 24 fps, across six aspect ratios, with durations from 2 to 12 seconds, the shortest minimum in the family, handy for quick loops, previews, and high-volume pipelines.
- As a 1.0-generation model it omits audio generation, last-frame input, multimodal reference, video editing, and extension, trading features for throughput; it does keep camera_fixed for locking the camera, which the 2.0 series drops, and it is the only Seedance model exposing a frames parameter for finer duration control, where frames wins if both are set.
- Two defaults to check: resolution defaults to 1080p, the most expensive tier, and the adaptive aspect ratio is not accepted for text-to-video.
- Returning the last frame lets you chain clips into something longer, since native extension is a 2.0 feature.
- On Synthorai it answers on the same asynchronous /v1/videos job API as the rest of the video lineup: create a task and poll it, or use Prefer: wait for short jobs.
FAQ
Is the Seedance 1.0 Pro Fast API free to try?
Yes: new accounts get 10 trial calls and up to $1 in free credit, no card required. That's enough to try Seedance 1.0 Pro Fast against your real workload before adding a payment method.
What is Seedance 1.0 Pro Fast best at?
Lowest per-token rate in the family; silent text- and image-to-video; 2-12 second durations up to 1080p. See the About section for the full picture from the vendor's own release notes.
How much does Seedance 1.0 Pro Fast cost?
Seedance 1.0 Pro Fast costs $1 per million video tokens on Synthorai (video tokens ≈ width × height × 24fps × seconds ÷ 1024). Only successful generations are billed: pay-as-you-go, no platform markup, no subscription.
How do I generate videos with the Seedance 1.0 Pro Fast API?
POST to /v1/videos on Synthorai with model="seedance-1-0-pro-fast-251015" to create an asynchronous job, then poll the task (or hold the request open with a Prefer: wait header) until the video URL is ready. No vendor SDK is needed.
How do I get access to Seedance 1.0 Pro Fast?
Point your existing OpenAI SDK at base_url="https://synthorai.io/v1", set model="seedance-1-0-pro-fast-251015", and you're done. One API key covers every model on the gateway.
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Every value on this page is transcribed from the vendor's own documentation, linked above, and carries the date it was checked. Prices are compared across the catalogue; specification values that vendors define differently are shown with the difference stated rather than charted. Nothing here is measured by us, and nothing is scored.