Happy Horse 1.0 is a 15-billion parameter open-source Transformer model designed for joint video and audio generation. It specializes in creating synchronized multimedia content with accurate multilingual lip-sync capabilities. The model serves content creators, video production teams, and developers who need to generate realistic talking head videos, educational content, or multilingual presentations. It addresses the technical challenge of seamlessly aligning audio speech with visual lip movements across different languages, eliminating the need for separate audio and video processing tools.