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Core conceptUnder the hood

Large language model

The kind of AI behind chat tools: trained on huge amounts of text, it generates answers by predicting the next word, over and over.

A large language model turns text in into text out Text goes into a large language model, which predicts the next word repeatedly to produce text out. Text in Large language model predicts the next word, over and over Text out Trained on huge amounts of text

A large language model, or LLM, is the engine behind tools like Claude. It is trained on a huge sweep of text, then generates answers by predicting the next word over and over, which is why it is so fluent.

"Large" is literal: these models have billions of internal settings tuned during training. Bigger, better-trained models can usually handle harder tasks. It is the technical name for the model you actually chat with.

Often confused with: AI in general. An LLM is one kind of AI model, the text-generating kind, not a synonym for all AI.

See it in a lesson: How generative AI works

Related terms

ModelGenerative AIToken

Further reading

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