LLM
An LLM, or large language model, is the program underneath AI search: software trained on an enormous amount of text that predicts what words should come next.
In a little more detail
Everything AI search does is that prediction, run very well and very fast. It is worth knowing because it explains the behaviour that surprises people: the model is producing a plausible continuation, not looking up a fact, which is why it can be confidently wrong.
Related terms
- AI search: AI search is a program you ask questions in plain language, like ChatGPT, Claude, Gemini or Perplexity, which writes you an answer instead of handing you a list of links.
- Hallucination: A hallucination is AI search stating something false with the same confidence it states something true.
See it on your own site
The scan reads your site the way AI search does and reports where you stand on this and sixteen other checks.