An LLM is an AI model trained on huge amounts of text so it can read, write and answer in plain language. LLM stands for large language model. It is a program that learned patterns in language by reading a huge amount of text.

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What is an LLM?

Short answer

An LLM is an AI model trained on huge amounts of text so it can read, write and answer in plain language.

Category Models
Also called large language model, large language models
Updated 20 Oct 2026

LLM, explained simply

LLM stands for large language model. It is a program that learned patterns in language by reading a huge amount of text.

It doesn't look answers up like a search engine. It predicts which words fit best next, one small piece at a time.

Chat tools like ChatGPT and Claude run on LLMs. When you ask for an email draft or a short summary, an LLM writes it for you.

On ITG Now, our daily AI news stories and AI models page often talk about new LLMs and how they compare.

AI model ChatGPT Token Transformer Context window Hallucination

Where you'll see it on ITG Now

Questions people ask about LLM

Is an LLM the same as ChatGPT?

No. ChatGPT is an app you talk to. An LLM is the engine inside apps like it.

How does an LLM work?

It learns patterns from lots of text. Then it predicts the next word again and again to build an answer.

Sources

Wikipedia: Large language model

Last updated 20 Oct 2026

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