HappyHorse 1.1 API ids: 480P to 1080P, 3 to 15 seconds

Alibaba Cloud Model Studio lists three HappyHorse 1.1 model ids: happyhorse-1.1-t2v, happyhorse-1.1-i2v and happyhorse-1.1-r2v. Each outputs 480P, 720P or 1080P, 3 to 15 seconds, 24 fps MP4, with audio. Sume's catalog docs name HappyHorse 1.1 as outside the v1 catalog, so you cannot call it by id on Sume.

Model ids are from Alibaba's video generation page; the Sume side is from the Video router docs and the repository's API notes, read 2026-10-01.

What are the HappyHorse ids and limits?

The 1.1 family adds a 480P tier. The 1.0 ids on the same page start at 720P, and the 1.0 family also has a video-edit id.

Can I call HappyHorse 1.1 on Sume?

Not at the time I read the docs. The API notes list Happy Horse 1.1 among families that are not in the v1 catalog. Ids not listed in GET /v1/video-router/models are rejected on generate, so read that endpoint rather than assuming an id.

What can I use instead?

Send model: "sume/auto" and Sume picks the family; the response echoes sume/auto and does not disclose which family ran. Or pin a listed id such as seedance-2.5 or gemini-omni-flash-1.1. Compare the 1.0 case in HappyHorse 1.0 vs Sume catalog ids.

What should I check before switching ids?

Read supported_resolutions, supported_durations and supported_aspect_ratios from the models endpoint for the id you pick; each model advertises its own subset, so a 480P tier or a 15 second clip is not a given.