Large Language Model (LLM)

A large language model is an AI system trained on vast amounts of text data to understand and generate human language. LLMs like Claude, GPT-4, and Gemini are the foundation of most modern AI tools. They predict the most likely next word in a sequence — which, at scale and with enough data, produces remarkably capable language understanding and generation.

The "large" refers to the number of parameters (internal settings) the model learned during training, often in the billions or trillions.