Skip to content
The Madison Avenue Field GuideA field guide to marketing & advertising, by Brandon Mina

GlossaryAI in MarketingLarge Language Model (LLM)

AI in Marketing

Large Language Model (LLM)

An AI model trained on vast text to understand and generate language.

By Brandon MinaCEO, BrandPilot AIUpdated November 2026

Short answer

A large language model (LLM) is an AI model trained on vast amounts of text to understand and generate human language. It works by predicting likely sequences of words, which lets it answer questions, summarize, translate, and write copy. LLMs power chatbots, AI search, and many marketing tools, but they can produce confident errors.