Definition & Explanation
A Large Language Model (LLM) is a type of artificial intelligence model built using deep learning techniques, trained on vast corpora of text data. LLMs like GPT-4, Claude, and Gemini can understand context, generate coherent text, write code, answer questions, and perform complex reasoning. They are the foundation of modern AI coding assistants and chat tools. The "large" refers both to the number of parameters (billions to trillions) and the scale of training data.