Tianyi Peng is an assistant professor in the Decision, Risk, and Operations division at Columbia Business School. He is broadly interested in AI for decision-making, with a focus on enhancing real-world systems using techniques like reinforcement learning, digital twins, and generative AI models. He is in the founding team of Cimulate.AI, developing Customer-GPT for e-commerce. His notable industry collaborations include projects with Anheuser-Busch InBev, TikTok, and Liberty Mutual, earning him the Daniel H. Wagner Prize, APS Best Student Paper Prize, and RMP Jeff McGill Student Paper Award. He holds a Ph.D. from MIT and a Bachelor's in Computer Science from Tsinghua Yao Class.