{"id":"alibaba/happy-horse-1.1","object":"model","type":"model","name":"HappyHorse 1.1","creator":"Alibaba","modality":"video","tasks":["text-to-video","image-to-video"],"description":"Alibaba's video model with its own sound and lip-synced speech, at 720p or 1080p, from text or a first frame.","revision":"2026-10-05","version":null,"latest":true,"status":"stable","deprecation":null,"added":"2026-10-05","pricing":{"unit":"second","usd":"0.24","overrides":[{"when":{"resolution":"720p"},"usd":"0.185"}],"drivers":["duration","resolution"]},"input_schema":{"type":"object","additionalProperties":false,"required":["prompt","duration"],"properties":{"prompt":{"type":"string","title":"Prompt","minLength":1,"maxLength":2500,"pattern":"\\S","x-leap-ui":{"group":"main","order":0,"widget":"textarea"}},"aspect_ratio":{"type":"string","title":"Aspect ratio","enum":["16:9","9:16","1:1","4:3","3:4","21:9","9:21","5:4","4:5"],"default":"16:9","x-leap-ui":{"group":"main","order":10,"widget":"segmented"}},"resolution":{"type":"string","title":"Resolution","enum":["720p","1080p"],"default":"1080p","x-leap-ui":{"group":"main","order":14,"widget":"segmented"}},"duration":{"type":"integer","title":"Duration","enum":[3,4,5,6,7,8,9,10,11,12,13,14,15],"default":5,"x-leap-ui":{"group":"main","order":12,"widget":"segmented","unit":"s"}},"seed":{"type":"integer","title":"Seed","minimum":0,"maximum":4294967295,"x-leap-ui":{"group":"advanced","order":50,"widget":"seed","help":"The same seed and input give the same image."}},"first_frame":{"type":"string","title":"First frame","pattern":"^file_[0-9A-Za-z]{24}$","x-leap-ui":{"group":"main","order":5,"widget":"image","help":"An image the video starts from. It is cropped to the video's shape."}}}}}