Seedance 2.0 Fast API

Seedance 2.0 at a lower price and faster turnaround (480p/720p), with first/last frame and image/video/audio references.

ByteDance·VideoAvailable

from$0.021/ second~~$0.024~~10% off

Model IDseedance-2.0-fast

Try in Playground View API

text-to-videoimage-to-videoreference-to-videoaudiofast

Input

Text · Image · Video · Audio

Output

Video

Provider

4 providers

Video task

reference · edit · extend

Duration (s)

4 – 15

Resolution

480p · 720p

Seedance 2.0 Fast pricing

Prices are per unit; requests without a provider are routed to the cheapest provider that supports your parameters.

Modes

Text-to-Video

Standard

from $0.036 / second

4 providers

Image-to-Video

First / last frame

from $0.036 / second

4 providers

Reference-to-Video

Image or audio reference

from $0.036 / second

4 providers

Reference-to-Video

Video reference · input + output seconds

from $0.021 / second

4 providers

Video Edit

Edit a video · input + output seconds

—

0 providers

Video Extend

Continue a video · input + output seconds

—

0 providers

Option	480p	720p
Text-to-Video Standard	$0.036 / second 4 Credits~~$0.04~~10% off	$0.077 / second 8 Credits~~$0.086~~10% off
Image-to-Video First / last frame	$0.036 / second 4 Credits~~$0.04~~10% off	$0.077 / second 8 Credits~~$0.086~~10% off
Reference-to-Video Image or audio reference	$0.036 / second 4 Credits~~$0.04~~10% off	$0.077 / second 8 Credits~~$0.086~~10% off
Reference-to-Video Video reference · input + output seconds	$0.021 / second 3 Credits~~$0.024~~10% off	$0.046 / second 5 Credits~~$0.051~~10% off

Try Seedance 2.0 Fast before you integrate

Test output quality, compare provider prices and estimate cost before writing any code.

Provider

Video

Estimated cost~~$0.428~~10% off39 credits$0.3852

Input

Modes

Prompt*prompt

Duration (s)duration

Resolutionresolution

Aspect ratioaspect_ratio

Generate audiogenerate_audio

Estimates use the current price catalog; prices are checked again on submission. Automatic routing may select another provider. Usage-based tasks settle after completion.

Result

Idle

Your generation will appear here.

Provider estimates for this request

Seedance 2.0 Fast API reference

Endpoints, request fields and runnable examples for this model.

Base URL

https://01router.com/api/v1

llms.txt

Quick start

Set API_KEY to your project key, then run a sample from your server. Replace example media URLs with your own public URLs.

Auto-routing chooses a provider that supports the request. Select a provider to see its input constraints and pinned request examples.

curl https://01router.com/api/v1/generations \
  -H "Authorization: Bearer $API_KEY" \
  -H "Content-Type: application/json" \
  --data-binary @- <<'JSON'
{
  "model": "seedance-2.0-fast",
  "input": {
    "prompt": "A cinematic shot of a red fox running through snow",
    "duration": 5,
    "resolution": "720p",
    "aspect_ratio": "16:9",
    "generate_audio": true
  }
}
JSON

# Replace GENERATION_ID with the id returned above; poll until status is "succeeded" or "failed"
curl https://01router.com/api/v1/generations/GENERATION_ID -H "Authorization: Bearer $API_KEY"

Endpoints

Only endpoints relevant to this model are listed. Paths below include /api/v1. Click an endpoint to read its usage.

POST

/api/v1/generations

Create a generation (charges credits) · API key required

GET

/api/v1/generations/{id}

Get a generation; polls the provider while running · API key required

POST

/api/v1/generations/{id}/cancel

Cancel a running generation (credits refunded) · API key required

POST

/api/v1/quote

Price a request on every provider (no charge, no key needed) · Public · no key

GET

/api/v1/prompts?model=seedance-2.0-fast&locale=en&page=1

Prompt list, model categories and filters · Public · no key

GET

/api/v1/prompts/{id}

Prompt details · Public · no key

GET

/api/v1/models/seedance-2.0-fast

Get one model · Public · no key

Name	Type	Required	Description
model	string	Yes	"seedance-2.0-fast"
provider	string	No	Pin a provider; omit to auto-route to the cheapest. One of: fal \| kie \| apimart \| atlascloud
input	object	Yes	Model parameters, see the input fields below.
callback_url	string	No	Optional public HTTPS webhook URL. The final task result is signed and delivered here; polling remains available.

Name	Type	Required	Values	Default
prompt*	string	Yes	—	—
image_url Optional start image (image-to-video)	string	No	—	—
end_image_url	string	No	—	—
image_urls Reference-to-video images; cite them in the prompt as the model documents	string[]	No	maxItems: 9	—
video_urls MP4/MOV references, or the clip to edit/extend; input seconds are billed	string[]	No	maxItems: 3	—
audio_urls Needs a reference image or video	string[]	No	maxItems: 3	—
task With video_urls: use them as references, edit the first one, or extend it	string	No	reference \| edit \| extend	—
duration	integer	No	min: 4 · max: 15	5
resolution	string	No	480p \| 720p	720p
aspect_ratio	string	No	16:9 \| 9:16 \| 1:1 \| 4:3 \| 3:4 \| 21:9	16:9
generate_audio	boolean	No	—	true

Output

Creating a task does not mean generation has finished. Keep its id, poll until succeeded or failed, then read outputs or error. Amounts below are illustrative; actual charges depend on the request.

queued→processing→succeeded / failed

Task submitted

{
  "id": "gen_example",
  "object": "generation",
  "model": "seedance-2.0-fast",
  "type": "video",
  "provider": "fal",
  "status": "processing",
  "input": {
    "prompt": "A cinematic shot of a red fox running through snow",
    "duration": 5,
    "resolution": "720p",
    "aspect_ratio": "16:9",
    "generate_audio": true
  },
  "outputs": [],
  "error": null,
  "credits": 0,
  "price_usd": 0,
  "created_at": "2026-10-25T08:00:00.000Z",
  "completed_at": null
}

Task completed

{
  "id": "gen_example",
  "object": "generation",
  "model": "seedance-2.0-fast",
  "type": "video",
  "provider": "fal",
  "status": "succeeded",
  "input": {
    "prompt": "A cinematic shot of a red fox running through snow",
    "duration": 5,
    "resolution": "720p",
    "aspect_ratio": "16:9",
    "generate_audio": true
  },
  "outputs": [
    "https://example.com/output.mp4"
  ],
  "error": null,
  "credits": 0,
  "price_usd": 0,
  "created_at": "2026-10-25T08:00:00.000Z",
  "completed_at": "2026-10-25T08:01:00.000Z"
}

Response fields

Name	Type	Required	Description
id	string	Yes	Generation ID. Use it to query or cancel this task.
object	string	Yes	generation
model	string	Yes	seedance-2.0-fast
type	string	Yes	video
provider	string	Yes	Provider
status	string	Yes	queued → processing → succeeded / failed. Stop polling at either terminal state.
input	object	Yes	Model parameters, see the input fields below.
outputs	string[]	Yes	Result URLs. Empty while processing; read after succeeded and save the files promptly.
error	string \| null	Yes	Failure reason, or null when no failure is reported.
credits	number	Yes	Credits charged for this request.
price_usd	number	Yes	Request price in USD.
created_at	string	Yes	Creation time in ISO 8601 format.
completed_at	string \| null	Yes	Completion time in ISO 8601 format; null before completion.

Get the result

Poll every few seconds until status is succeeded or failed. Output URLs are provider-hosted and may expire — download them promptly. Or pass callback_url to get the result pushed.

curl "https://01router.com/api/v1/generations/GENERATION_ID" \
  -H "Authorization: Bearer $API_KEY"

queued → processing → succeeded / failed. Stop polling at either terminal state. Result URLs. Empty while processing; read after succeeded and save the files promptly.

Cancel a task

Cancellation depends on provider support and task state. A confirmed cancellation returns status: failed and error: Canceled by user. Unsupported or completed tasks return 409 not_cancelable.

curl -X POST "https://01router.com/api/v1/generations/GENERATION_ID/cancel" \
  -H "Authorization: Bearer $API_KEY"

Quote

Choose API quotes or frontend quotes: the API returns costs for currently available providers; frontend quotes read prices and billing fields from models and recalculate locally when inputs change.

curl "https://01router.com/api/v1/quote" -H "Content-Type: application/json" --data-binary @- <<'JSON'
{
  "model": "seedance-2.0-fast",
  "input": {
    "prompt": "A cinematic shot of a red fox running through snow",
    "duration": 5,
    "resolution": "720p",
    "aspect_ratio": "16:9",
    "generate_audio": true
  }
}
JSON

Prompt API

Public read-only endpoints: no API key or credits required. Browse published examples for active models using combined model, source and scene filters.

curl "https://01router.com/api/v1/prompts?model=seedance-2.0-fast&locale=en&page=1"
curl "https://01router.com/api/v1/prompts/PROMPT_ID?locale=en"

Use modelSlug and prompt to construct the request body below for POST /generations. Generation still requires an API key and incurs model charges. Query GET /models/seedance-2.0-fast for any additional required inputs.

Model schema

This public endpoint returns the model parameters and each provider’s supported constraints and prices.

curl "https://01router.com/api/v1/models/seedance-2.0-fast"

Errors

Check the HTTP status and error.message. Fix the request before retrying validation or authentication errors. A failed generation is reported in status and error on the task itself.

{
  "error": {
    "message": "Invalid or missing API key",
    "code": "unauthorized"
  }
}

400Invalid body or parameter value

401Missing or invalid API key

402Not enough credits

404Unknown model or generation

409The task cannot be canceled (already finished, or the provider does not support canceling)

429Too many requests — retry after the given seconds

502Every provider rejected the task (credits refunded)

Auth, routing, billing and error codes are covered in →

Use with AI

Give your coding assistant this model reference: endpoints, input constraints, output fields and request examples in plain text.

Open llms.txt

How does Seedance 2.0 Fast compare?

Specs and starting prices side by side. Test with the same prompt before you choose.

	Seedance 2.0 Fast	Seedance 2.5	Seedance 2.0	Seedance 2.0 Mini
Vendor	ByteDance	ByteDance	ByteDance	ByteDance
Starting price	$0.021 / second	$0.052 / second	$0.036 / second	$0.0099 / second
Input	Text · Image · Video · Audio	Text · Image · Video · Audio	Text · Image · Video · Audio	Text · Image · Video · Audio
Provider	4 providers	9 providers	9 providers	9 providers
Video task	reference · edit · extend	reference · edit · extend	reference · edit · extend	reference · edit · extend
Duration (s)	4 – 15	4 – 30	4 – 15	4 – 15
Resolution	480p · 720p	480p · 720p · 1080p	480p · 720p · 1080p	480p · 720p

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Seedance 2.0 Fast API

Seedance 2.0 Fast pricing

Try Seedance 2.0 Fast before you integrate

Input

Result

Provider estimates for this request

Seedance 2.0 Fast API reference

Quick start

Endpoints

Authentication

Input

Request body

input · input fields

Output

Task submitted

Task completed

Response fields

Get the result

Cancel a task

Quote

Prompt API

Model schema

Errors

Use with AI

How does Seedance 2.0 Fast compare?

Related models

Seedance 2.5

Seedance 2.0

Seedance 2.0 Mini

Grok Imagine Video 1.5

Grok Imagine Video 1.5 Lite

MiniMax H3 Max