Large Behavior Models (LBMs) are emerging as a powerful new tool in AI, offering profound insights into complex human, social, and even organizational behaviors. By processing and learning from enormous datasets—ranging from individual actions to societal trends—LBMs can generate nuanced and adaptive responses, enabling machines to interact with humans in ways that feel natural, responsive, and contextually aware. This capability opens a world of transformative possibilities, blurring the lines between human and machine interaction and reshaping how we experience the digital world.