Guide
Glossary
Large language model (LLM)
A large language model (LLM) is an AI system trained on vast amounts of text to predict the next piece of text in a sequence, which lets it write, summarise, translate and answer questions in plain language. LLMs power ChatGPT, Claude, Gemini and Microsoft Copilot. They learn patterns in language rather than keeping a database of facts, so a fluent answer is not always a correct one. Unless it is connected to search or your own documents, an LLM only knows what was in its training data, which stops at a cut-off date. The same model can sit behind very different products, so where your data goes depends on the plan and settings you use.
Also called LLM, language model
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Example
In an accounting firm
A 30-person accounting firm finds staff pasting client emails into personal AI accounts to draft replies. The model behind a free account and a business plan can be much the same; what differs is the terms, the admin controls and whether conversations may be used for training. The partners move everyone onto one managed business plan with single sign-on and a written usage policy.
Guides that explain it in context
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