Fei-Fei Li’s World Labs speeds up the world model race with Marble, its first commercial product

Startups like Decart and Odyssey have released free demos, and Google’s Genie is still in limited research preview. Marble differs from these — and even World Labs’s own real-time model, RTFM — because it creates persistent, downloadable 3D environments rather than generating worlds on-the-fly as you explore. This, the company says, results in less morphing or inconsistency, and lets users export worlds as Gaussian splats, meshes or videos.