NVIDIA Cosmos is a world foundation model platform designed for physical AI and robotics applications, capable of generating photorealistic videos of physical environments for training simulation. Cosmos models understand the laws of physics, enabling them to generate realistic videos of robots performing tasks, autonomous vehicles navigating environments, and other physical world scenarios. This capability dramatically accelerates robot training by providing virtually unlimited synthetic training data. Cosmos is open-sourced under a permissive license for researchers and robotics developers.