Jakub Pachocki serves as the Chief Scientist at OpenAI, a role he assumed in May 2024. In this capacity, he oversees the development of advanced artificial intelligence models. He is widely recognized for his leadership in the development of GPT-4, a significant achievement in the field of large language models. Prior to becoming Chief Scientist, Pachocki was OpenAI's research director, where he also led the development of OpenAI Five.