Andrej Karpathy’s video continues his series on large language models (LLMs), shifting from foundational theory to hands-on usage. Below is a timestamped summary of the key points covered. Introduction (0:00–0:34) Karpathy introduces the video as a follow-up to his prior explanation of how LLMs are trained. This session focuses on how to actually use LLMs in daily life and work. LLM Ecosystem (0:34–2:49) He overviews the current LLM landscape: ChatGPT by OpenAI is described as the “Original Gangster” and most feature-rich.