World Models: The Hype and Challenges of Simulating Reality

Recent advances in artificial intelligence have largely revolved around large language models (LLMs), but a new category called "world models" is now attracting significant investment and research. These systems aim to simulate the physical world—or a close approximation—rather than just processing language. A wave of announcements over the past year signals growing momentum in this field, though the technology remains limited in its ability to fully replicate reality.