Artificial Intelligence is the broad field of creating machines that can perform tasks requiring human-like intelligence, such as reasoning, learning, or perception. Machine Learning is a subset of AI where systems learn from data without explicit programming. Large Language Models are a specific type of ML model trained on vast text data to generate or understand language. LLMs are very much AI, and while they've popularized the term "AI" recently, the hierarchy stands: LLMs are ML, and ML is AI.