
Happy Horse 1.0 is an open-source AI video generation model released in April 2026. Upon its launch, it topped the Artificial Analysis video generation leaderboard, becoming the most powerful AI video generator available today.It features 15 billion parameters with a unified Transformer architecture using 40-layer self-attention. Its standout capability is generating both video and audio simultaneously in a single pass, achieving perfect synchronization between visuals and sound. It supports lip-sync in 7 languages: English, Mandarin, Cantonese, Japanese, Korean, German, and French, making it incredibly useful for digital avatars, voiceover videos, and similar applications.Happy Horse 1.0 outputs 1080p HD quality with clips lasting 5 to 8 seconds per generation. Thanks to its 8-step DMD-2 distillation acceleration technology, generation takes approximately 10 to 38 seconds, making it quite efficient. It uses a unified architecture to process text, image, video, and audio tokens together, rather than relying on traditional multi-module combinations. This design ensures more consistent and harmonious output quality.