Models/ByteDance/Seedance 2.0

ByteDance: Seedance 2.0

Name: Seedance 2.0
Brand: ByteDance
Price: 0.246 USD
Availability: InStock

Videoseedance-2.0

ByteDance Seedance 2.0: multimodal video with strong multi-shot consistency, up to 4K.

API docs

Playgroundseedance-2.0

Reference image＋Upload

duration

Resolution

Aspect ratio

generate_audio

Latency9.5 s

24hnow

Specifications

Authorbytedance

ModalityVideo

Price$0.25 / second$0.30 / second

Savings−18%

ReleasedJul 23, 2026

Quick start

# Video is asynchronous: create, then poll.
curl https://api.altrouter.ai/v1/videos \
  -H "Authorization: Bearer ar-..." \
  -H "Content-Type: application/json" \
  -d '{
    "model": "seedance-2.0",
    "prompt": "a drone shot over a coastline"
  }'
# → { "id": "vid_...", "status": "queued" }

curl https://api.altrouter.ai/v1/videos/vid_... \
  -H "Authorization: Bearer ar-..."
# → { "status": "completed", "url": "https://api.altrouter.ai/media/videos/..." }

Same OpenAI-compatible endpoint — just swap base_url and key.

API

An asynchronous endpoint: the call returns immediately in queued, and you poll GET /v1/videos/{id} for the result. The finished mp4 is re-hosted on our CDN, and only a completed render is charged.

POST/v1/videos

Body parameters

modelstringrequired"seedance-2.0"

The model id.

promptstringrequired

The text description of the scene.

secondsinteger

Clip length; `duration` is accepted as an alias.

imagestringURL or base64

A reference frame — its presence routes to the model’s image-to-video variant.

durationnumber4–15default 5

Clip length in seconds (affects price).

resolutionenum480p · 720p · 1080pdefault 720p

Resolution tier (affects price).

aspect_ratioenum1:1 · 4:3 · 3:4 · 16:9 · 9:16 · 21:9default 16:9

Output aspect ratio.

generate_audiobooleandefault true

Generate an audio track.

Response

The same object comes back from GET /v1/videos/{id}; the finished file is also served directly from GET /v1/videos/{id}/content.

idstring

The render id (vid_…) — this is what you poll.

statusenumqueued · in_progress · completed · failed

The state of the render.

urlstring

The finished mp4 on our CDN — appears at status: completed.

secondsinteger

The clip length the price was computed on.

errorobject

Why it failed at status: failed: { code, message }.

Example

cURLPythonJSON

curl https://api.altrouter.ai/v1/videos \
  -H "Authorization: Bearer ar-..." \
  -H "Content-Type: application/json" \
  -d '{
  "model": "seedance-2.0",
  "prompt": "a drone shot over a rocky coastline at sunrise",
  "resolution": "720p",
  "aspect_ratio": "16:9"
}'

Errors

400Invalid request.

401Missing or invalid API key.

402Insufficient credits, or the key’s spending cap is exhausted.

404Model not found.

429Rate limit exceeded.