Yann LeCun, Meta's former chief AI scientist, has raised $1 billion to fund his new startup, Advanced Machine Intelligence (AMI), which aims to develop AI world models that understand the physical world. LeCun believes that current large language models (LLMs) are limited and will not lead to human-level intelligence. AMI plans to build open-source technology and work with companies in various industries to optimize their operations. The startup's goal is to create a new breed of AI systems that can reason, plan, and interact with the physical world.