HappyHorse

HappyHorse is the premier open-source AI video generation platform, distinguished as the #1 ranked model on Artificial Analysis Arena. It establishes a new industry standard through its unified 40-layer Transformer architecture that processes text, video, and audio tokens in a single pass, eliminating the need for separate post-processing. Targeting professional creators, indie developers, marketers, and businesses, its core features include true joint audio-video generation, 8-step fast inference via DMD-2 distillation, and native multilingual lip-sync with a 14.60% word error rate across seven languages. Content features span text-to-video and image-to-video workflows, multi-shot narrative capabilities, and diverse aesthetic styles from photorealistic to anime. The user experience is streamlined for efficiency, offering priority queues and batch generation, while its fully open-source nature under a commercial-friendly license provides unparalleled technical flexibility for deployment and fine-tuning on custom GPU infrastructure, delivering cinema-grade output up to 2K resolution.