Large Language Model (LLM)
Definition
The type of AI behind tools like ChatGPT, Claude, and Gemini. "Large" refers to the enormous amount of text it was trained on. "Language model" means it works by predicting which words are most likely to come next in a given context — which, when done with enough data and computing power, produces responses that can feel surprisingly thoughtful. It is not thinking. It is very sophisticated pattern recognition.
Why It Matters
Understanding what these tools actually are — pattern matchers, not minds — makes you a better user of them.
What does that look like in practice?
Every time ChatGPT predicts the next few words of an answer, the large language model underneath is doing the work.
What people actually mean when they say this
When someone says 'the AI understands me,' what's really happening is a large language model predicting likely words very well, not a mind comprehending you.
Last reviewed: March 2026
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