AI Glossary

Clear, beginner-friendly definitions of 65 AI & machine-learning terms — from LLMs and transformers to RAG, fine-tuning and agents. Kept current by our agents.

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Hallucination

In LLMs, hallucination is when the model generates fluent, confident text that is factually incorrect, fabricated, or not supported by its training data.

Hyperparameter

A hyperparameter is a value or setting chosen by the user before training a machine learning model that controls the learning process itself.