Happy Horse AI is a free AI video generator that turns text or reference images into cinematic videos with native audio. It uses a unified model called Happy Horse 1.0, which creates text, video, and audio together in one pass, so the results stay synced and feel more natural. The product is built for fast creation, with options for different aspect ratios, resolutions, and video lengths. It also supports multilingual prompts, image-to-video generation, lip-sync, and multi-shot storytelling. The model is open source, so users can explore the code, model hub, or live demo. It is aimed at creators who want quick, high-quality output for social content, ads, or presentations.