Seedance 2.5 API

ByteDance Seedance 2.5 video generation model

Endpoint

POST https://api.hedra.com/v3/models/seedance-25

Example request

curl -X POST "https://api.hedra.com/v3/models/seedance-25" \
  -H "Authorization: Key $HEDRA_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"input": {"prompt": "a cinematic shot of a city at dusk"}}'

Parameters

num_outputsinteger

Number of outputs generated per job. Only 1 is supported.

promptstringrequired

Generation prompt.

aspect_ratiostringrequired

Output aspect ratio.

resolutionstringrequired

Output resolution.

duration_msintegerrequired

Duration in ms.

generate_audioboolean

Whether to generate native audio for the video.

start_image

Start frame (image-to-video).

end_image

End frame (first-last-frame-to-video).

imagesarray

Reference images.

videosarray

Reference videos.

audiosarray

Reference audios.