InfiniteTalk is an open-source AI model for generating unlimited-length talking videos with accurate lip synchronization. It supports both video-to-video and image-to-video generation, synchronizing not just lips but also head movements, body posture, and facial expressions with audio input. The project provides comprehensive installation instructions, multiple inference options including multi-GPU support, low VRAM configurations, and integration with tools like Gradio and ComfyUI. The model achieves superior lip synchronization compared to existing solutions and includes optimizations like TeaCache acceleration and quantization for memory efficiency.