ByteDancevideoFastOperational

Seedance 2.0 Fast Reference to Video API

Name: Seedance 2.0 Fast API
Brand: ByteDance
Availability: InStock

Reference to Video with Seedance 2.0 Fast by ByteDance. Seedance 2.0 quality at lower latency and cost.

bytedance/seedance-2.0-fast/reference-to-video

FromUp to −22%

$0.044/s$0.056

per second of video · 480p

Open in Studio API

Try Seedance 2.0 Fast Reference to Video

Prompt*

Type @ to point at a reference image, video or audio clip0/5000

Reference images

Up to 9 images for characters, products, style or scene. Refer to them in the prompt as @Image1, @Image2…

Reference videos

Up to 3 MP4/MOV clips for motion, camera moves or effects (2–15 s each, 15 s in total, ≤ 50 MB in total). Refer to them as @Video1, @Video2… Reference-video seconds are billed together with the output, at the lower with-video token rate.

Reference audio

Up to 3 MP3/WAV clips for voice, music or sound (2–15 s each, 15 s in total, ≤ 15 MB each). Refer to them as @Audio1, @Audio2… Needs at least one reference image or video.

Aspect ratio

Output frame shape.

Resolution

Output resolution. Higher resolutions cost more per second.

Duration

Length of the generated clip in seconds (4–15s). You pay per second.

Generate audio

Generate synchronized sound, ambience and dialogue. No extra cost.

Estimated cost…

Create a free account with Google or email — pay only for what you generate.

Your video will appear here

Write a prompt, pick your settings and hit Run. You only pay for successful generations.

Also available: Seedance 2.0 Fast Text to Video · Seedance 2.0 Fast Image to Video

Seedance 2.0 Fast Reference to Video API

POST/api/v1/run/bytedance/seedance-2.0-fast/reference-to-video

Submits an asynchronous job and returns 202 with a generation id. Poll GET /api/v1/generations/{id} or pass webhook_url. See job lifecycle.

Input parameters

Name	Type	Description	Affects price
`prompt`required	string	Describe the shot: subject, action, camera movement, lighting and style.	No
`reference_image_urls`	string[] (URLs)	Up to 9 images for characters, products, style or scene. Refer to them in the prompt as @Image1, @Image2… Max items: 9	No
`reference_video_urls`	string[] (video URLs)	Up to 3 MP4/MOV clips for motion, camera moves or effects (2–15 s each, 15 s in total, ≤ 50 MB in total). Refer to them as @Video1, @Video2… Reference-video seconds are billed together with the output, at the lower with-video token rate. Max items: 3	Yes
`reference_audio_urls`	string[] (audio URLs)	Up to 3 MP3/WAV clips for voice, music or sound (2–15 s each, 15 s in total, ≤ 15 MB each). Refer to them as @Audio1, @Audio2… Needs at least one reference image or video. Max items: 3	No
`aspect_ratio`	string (enum)	Output frame shape. Values: 16:9 · 9:16 · 1:1 · 4:3 · 3:4 · 21:9 Default: 16:9	Yes
`resolution`	string (enum)	Output resolution. Higher resolutions cost more per second. Values: 480p · 720p Default: 720p	Yes
`duration`	integer	Length of the generated clip in seconds (4–15s). You pay per second. Range: 4–15s Default: 5	Yes
`generate_audio`	boolean	Generate synchronized sound, ambience and dialogue. No extra cost. Default: true	No
`seed`	integer	Use the same seed and settings to reproduce a result. Leave empty for random.	No
`webhook_url`	string (URL)	Optional. We POST the finished generation here, signed with your webhook secret. Webhooks	No

Request

curl -X POST https://cheapergen.com/api/v1/run/bytedance/seedance-2.0-fast/reference-to-video \
  -H "Authorization: Bearer $CHEAPERGEN_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
  "prompt": "@Image1 unboxes the product from @Image2 on a marble desk, copying the camera move of @Video1",
  "reference_image_urls": [
    "https://cdn.cheapergen.ai/samples/reference-1.jpg",
    "https://cdn.cheapergen.ai/samples/reference-2.jpg"
  ],
  "reference_video_urls": [
    "https://cdn.cheapergen.ai/samples/reference-1.mp4"
  ],
  "aspect_ratio": "16:9",
  "resolution": "720p",
  "duration": 5
}'

import os, time, requests

API = "https://cheapergen.com/api/v1"
headers = {"Authorization": f"Bearer {os.environ['CHEAPERGEN_API_KEY']}"}

# 1. Submit the job
job = requests.post(f"{API}/run/bytedance/seedance-2.0-fast/reference-to-video", headers=headers, json={
    "prompt": "@Image1 unboxes the product from @Image2 on a marble desk, copying the camera move of @Video1",
    "reference_image_urls": [
        "https://cdn.cheapergen.ai/samples/reference-1.jpg",
        "https://cdn.cheapergen.ai/samples/reference-2.jpg"
    ],
    "reference_video_urls": [
        "https://cdn.cheapergen.ai/samples/reference-1.mp4"
    ],
    "aspect_ratio": "16:9",
    "resolution": "720p",
    "duration": 5
}).json()

# 2. Poll until it finishes (or pass "webhook_url" and skip polling)
while job["status"] in ("queued", "running"):
    time.sleep(3)
    job = requests.get(f"{API}/generations/{job['id']}", headers=headers).json()

print(job["status"], job["output"]["video"]["url"] if job["status"] == "succeeded" else job["error"])

const API = "https://cheapergen.com/api/v1";
const headers = {
  Authorization: `Bearer ${process.env.CHEAPERGEN_API_KEY}`,
  "Content-Type": "application/json",
};

// 1. Submit the job
let job = await fetch(`${API}/run/bytedance/seedance-2.0-fast/reference-to-video`, {
  method: "POST",
  headers,
  body: JSON.stringify({
    "prompt": "@Image1 unboxes the product from @Image2 on a marble desk, copying the camera move of @Video1",
    "reference_image_urls": [
      "https://cdn.cheapergen.ai/samples/reference-1.jpg",
      "https://cdn.cheapergen.ai/samples/reference-2.jpg"
    ],
    "reference_video_urls": [
      "https://cdn.cheapergen.ai/samples/reference-1.mp4"
    ],
    "aspect_ratio": "16:9",
    "resolution": "720p",
    "duration": 5
  }),
}).then((r) => r.json());

// 2. Poll until it finishes (or pass webhook_url and skip polling)
while (job.status === "queued" || job.status === "running") {
  await new Promise((r) => setTimeout(r, 3000));
  job = await fetch(`${API}/generations/${job.id}`, { headers }).then((r) => r.json());
}

console.log(job.status === "succeeded" ? job.output.video.url : job.error);

Response

{
  "id": "gen_8c2QmX1nq0k4",
  "object": "generation",
  "model": "bytedance/seedance-2.0-fast",
  "endpoint": "bytedance/seedance-2.0-fast/reference-to-video",
  "mode": "reference-to-video",
  "status": "queued",
  "input": {
    "prompt": "@Image1 unboxes the product from @Image2 on a marble desk, copying the camera move of @Video1",
    "reference_image_urls": [
      "https://cdn.cheapergen.ai/samples/reference-1.jpg",
      "https://cdn.cheapergen.ai/samples/reference-2.jpg"
    ],
    "reference_video_urls": [
      "https://cdn.cheapergen.ai/samples/reference-1.mp4"
    ],
    "aspect_ratio": "16:9",
    "resolution": "720p",
    "duration": 5
  },
  "output": null,
  "error": null,
  "cost": {
    "amount_usd": 0.2255,
    "currency": "usd",
    "estimated": true,
    "official_usd": null,
    "saved_usd": null
  },
  "source": "api",
  "started_at": null,
  "completed_at": null,
  "urls": {
    "get": "https://cheapergen.com/api/v1/generations/gen_8c2QmX1nq0k4",
    "cancel": "https://cheapergen.com/api/v1/generations/gen_8c2QmX1nq0k4/cancel"
  },
  "created_at": "2026-10-15T09:21:04Z"
}

{
  "id": "gen_8c2QmX1nq0k4",
  "object": "generation",
  "model": "bytedance/seedance-2.0-fast",
  "endpoint": "bytedance/seedance-2.0-fast/reference-to-video",
  "mode": "reference-to-video",
  "status": "succeeded",
  "input": {
    "prompt": "@Image1 unboxes the product from @Image2 on a marble desk, copying the camera move of @Video1",
    "reference_image_urls": [
      "https://cdn.cheapergen.ai/samples/reference-1.jpg",
      "https://cdn.cheapergen.ai/samples/reference-2.jpg"
    ],
    "reference_video_urls": [
      "https://cdn.cheapergen.ai/samples/reference-1.mp4"
    ],
    "aspect_ratio": "16:9",
    "resolution": "720p",
    "duration": 5
  },
  "output": {
    "video": {
      "url": "https://cdn.cheapergen.ai/outputs/gen_8c2Q.mp4",
      "content_type": "video/mp4",
      "duration": 5,
      "width": 1280,
      "height": 720
    }
  },
  "error": null,
  "cost": {
    "amount_usd": 0.2255,
    "currency": "usd",
    "estimated": false,
    "official_usd": 0.264,
    "saved_usd": 0.0385
  },
  "source": "api",
  "created_at": "2026-10-15T09:21:04Z",
  "started_at": "2026-10-15T09:21:06Z",
  "completed_at": "2026-10-15T09:22:31Z"
}

Seedance 2.0 Fast pricing

Pay per second of video. No subscription. Failed generations are refunded automatically.

Tier	Official price	Cheaper Gen.	You save
480p 16:9 · 24 fps	~~$0.056~~/s	$0.044/s	−22%
720p 16:9 · 24 fps	~~$0.121~~/s	$0.094/s	−22%

Official price: BytePlus ModelArk official price ($5.6 / 1M tokens; $3.3 with video input). Prices verified 2026-10-14.
Billed by video tokens; per-second figures assume 16:9 and no input video.
With reference videos, (reference video seconds + output seconds) are billed at the lower with-video token rate.

About Seedance 2.0 Fast All Seedance 2.0 Fast endpoints