LLM (Large Language Model)
Large Language Model
AI technology that learns language patterns from massive text, enabling it to read and write natural, human-like text.
In Simple Terms
It's an AI model designed to learn the patterns of human language from massive amounts of data and generate natural text. A key feature is that it calculates and stores the probability of which word is most likely to follow another. This allows it to choose words that fit the surrounding context, creating an experience that feels as if a human understands the meaning and is speaking naturally. It serves as the brain behind conversational AI services like ChatGPT, Claude, and Gemini.
Behind the Name
It's short for "Large Language Model." "Large" means massive scale, "Language" refers to human language, and "Model" refers to a prediction system built by learning from data. Because it takes in an enormous amount of text as training data, it's called "Large."
Take a Closer Look!
An LLM is an AI model designed to learn the patterns of human language and generate natural text.
An AI model is a system that learns from data to make predictions.
The basic mechanism is very simple: during training, it reads through massive amounts of text data and continuously calculates "which word is most likely to come after a given word," learning those patterns.
For example, it learns hundreds of millions of patterns — if someone says "Once upon a time," the next words are likely "there lived a" — and so on.
Thanks to this technology, AI can now do what was once very difficult: choosing words that fit the context.
By chaining together "words most likely to come next" based on the flow of conversation, it crafts responses that feel as if a human understands the meaning and is speaking naturally.
The LLM is what powers conversational AI services like ChatGPT, Claude, and Gemini.