Happy Horse 1.0 is a 15B-parameter open-source AI video generation model that creates short, high-quality videos with synchronized audio from text or image prompts. It combines a unified Transformer architecture, multilingual lip-sync, and 1080p output in 5–8 second clips. The model also includes distilled inference, super-resolution, and open-source deployment code, making it suitable for self-hosted workflows. It supports commercial use and is optimized for efficient generation on modern GPUs. The product focuses on joint video-and-audio synthesis, stable output quality, and practical deployment for creators, developers, and researchers.