What is Large Language Model (LLM)? Simple Explanation (2026)
AI Glossary
What is Large Language Model (LLM)?
Definition: A Large Language Model (LLM) is an AI system trained on massive amounts of text data that can understand and generate human-like text. LLMs power tools like ChatGPT (GPT-4), Claude (by Anthropic), Gemini (by Google), and others.
How Does Large Language Model Work?
LLMs use transformer architecture and are trained on billions of text samples from the internet. They learn patterns in language — grammar, facts, reasoning — by predicting the next word in a sequence. The ‘large’ refers to billions of parameters (weights) in the model.
Examples
GPT-4o (OpenAI), Claude 3.5 (Anthropic), Gemini (Google), LLaMA 3 (Meta), Mistral (Mistral AI), DeepSeek-V3
Related Reading
Learn more about how Large Language Model is used in practice:
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