What is LLM? Plain-English Definition | LLMs Guru AI Dictionary

In more detail

LLM stands for large language model — the kind of AI behind ChatGPT, Claude and Gemini. It’s a program that read a colossal amount of text during training and learned the patterns of language so deeply that it can write, summarize, translate and reason with words.

The surprise of the decade is how far ‘predict the next word’ can go. Do it well enough, and drafting emails, explaining contracts and writing working code all fall out of that one skill. When people say ‘AI’ today, an LLM is usually what they mean.

📌 See it in action

You type ‘Draft a polite email declining a meeting.’ The LLM doesn’t look one up — it generates a fresh email word by word, each choice shaped by patterns learned from billions of sentences. The same trick works whether you ask for an email, a poem, or a spreadsheet formula.

Goes with

Transformer →Token →Parameters →Pretraining →

Now put the vocabulary to work.

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