Seedream 4.5 API

Latest Seedream with enhanced detail, refined composition, and multi-reference image support for professional visuals.

Endpoint

POST https://api.hedra.com/v3/models/seedream-45

Example request

curl -X POST "https://api.hedra.com/v3/models/seedream-45" \
  -H "Authorization: Key $HEDRA_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"input": {"prompt": "a cinematic shot of a city at dusk"}}'

Parameters

promptstringrequired

Generation prompt.

num_outputsinteger

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

enhance_promptboolean

Rewrite the prompt before generation. An LLM expands it into a fuller description and the model receives that text instead of the submitted one; the result's `prompt` reports what ran.

aspect_ratiostringrequired

Output aspect ratio.

resolutionstringrequired

Output resolution.

imagesarray

Images to edit or blend. 1 to 14 images, each at most 30 MB.