Your actions speak louder than words—what if AI were listening? When AI understands behavior, not just language, entirely new possibilities emerge. In this TEDxMIT talk, researcher Rickard Brüel Gabrielsson unveils BehaviorGPT, the first Large Behavioral Model (LBM) trained on 1 trillion real-world actions. While traditional Large Language Models (LLMs) learn from words, LBMs like BehaviorGPT learn from behavior: how we shop, use apps, move, and make decisions. This action-based intelligence has already driven a 20% increase in sales for major retailers, pointing to a future where AI truly understands us. Discover why actions speak louder than LLMs, and how behavior modeling could be the next leap toward Artificial General Intelligence (AGI). Rickard Brüel Gabrielsson is an AI researcher from Stanford and MIT, a lecturer on foundation models at MIT, and co-founder of Unbox AI, a company pioneering behavior-based AI. This talk was given at a TEDx event using the TED conference format but independently organized by a local community. Learn more at https://www.ted.com/tedx