---
title: "What is a large language model (LLM), and how does it work?"  
description: "What is a large language model (LLM), and how does it work?"  
author: "Kacper Jankowski"  
published: 2026-11-12  
updated: 2026-11-12  
canonical: https://answers.mindstick.com/qa/119971/what-is-a-large-language-model-llm-and-how-does-it-work  
category: "Artificial Intelligence"  
tags: ["large language model", "llm", "chatgpt", "gemini", "generative ai"]  
reading_time: 2 minutes  

---

# What is a large language model (LLM), and how does it work?



## Answers

### Answer by Jahnavi 

A **large language model (LLM)** is an AI system trained on an enormous amount of text: books, websites, articles, code and more. ChatGPT, Gemini, Claude, Llama and India's own models like those from Sarvam are all built on LLMs.

## How it works, simply:

1. **Training:** the model reads billions of sentences and repeatedly tries to **predict the next word** (more precisely, the next "token", a word or piece of a word). Each time it is wrong, its internal settings, called parameters, are adjusted slightly. Large models have billions of these parameters.
2. **Learning patterns:** by doing this at massive scale, the model picks up grammar, facts, writing styles, reasoning patterns and even how to write code.
3. **Fine-tuning:** developers then train it further on examples of helpful conversations, and use human feedback, so it answers questions properly and avoids harmful content.
4. **Generating:** when you type a question, the model writes the answer one token at a time, each time choosing a likely next token based on everything so far.

Important limits:

- It does not "look up" facts like a database unless it is connected to search or documents. It can sound confident and still be wrong, which is called hallucination.
- Its knowledge has a **cut-off date** from when training ended.
- It reflects patterns, and sometimes biases, in its training data.

To get better results from an LLM, see our tips on writing good prompts.


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Original Source: https://answers.mindstick.com/qa/119971/what-is-a-large-language-model-llm-and-how-does-it-work

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