World Models
World Foundation Models Explained: How AI Learns to Simulate Reality
World foundation models (WFMs) learn a physics-aware, controllable simulation of an environment — not passive video, but worlds you can act inside. Here is what a WFM actually is, how it differs from an LLM, how the architectures work, the 2026 landscape (NVIDIA Cosmos 3, DeepMind Genie 3, World Labs Marble), and how builders can start using them today.
Jithin Kumar Palepu · Jun 4, 2026 · 16 min read