HappyHorse

HappyHorse 1.0 is an AI video generation model from Alibaba's ATH Innovation Unit that supports the full matrix of video generation modalities: text-to-video and image-to-video, both with and without native audio synthesis. The model uses physics-aware motion modeling for realistic movements, accurate lip-sync with dialogue matching, and an 8-step efficient generation process. It natively handles prompts in English, Chinese, and Japanese. HappyHorse ranks #1 or #2 across major Artificial Analysis Video Arena leaderboards, making it one of the most competitive open video generation models available. Primary use cases include content creation, marketing, gaming, and e-commerce.