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01 Introduction

What is an LLM?

  • LLM = Large Language Model
  • It’s an AI system trained on massive amounts of text to predict the next word in a sequence.
  • By learning patterns, grammar, facts, and reasoning from text, it can generate human-like language, answer questions, write code, summarize, translate, and more.
  • Most modern LLMs (like GPT-4, GPT-5, Claude, LLaMA) are built on the transformer architecture introduced by Google in 2017.

Strengths of LLMs

  1. Text generation (stories, blogs, emails)
  2. Summarization
  3. Code writing and debugging
  4. Translation
  5. Question answering
  6. Chatbots and virtual assistants

Limitations of LLMs

  1. Can produce incorrect information confidently.
  2. Might not be able to handle recent events.
  3. Sensitive to prompt wording.