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Outcome School · AI agents20 min read

by Amit Shekhar · 27 April 2026

AI Agent Explained

The AI Agent - what it is, how it is different from a plain LLM, its five core parts, how it works end to end, the main types, and when to use one.

3,903 words#ai-agent#llm#ai#machine-learning4 recall cards

AI Agent Explained
Read on Outcome School ↗then come back to lock it in
Before you read, guess

How does an AI agent differ from a standard chatbot?

Ten seconds, a guess, then read — a wrong guess still makes the answer stick.

What this article covers

  1. The Big Picture
  2. What is an AI Agent
  3. AI Agent vs Plain LLM vs Chatbot
  4. The Five Core Parts
  5. How an AI Agent Works End to End
  6. A Concrete Example: Research Agent
  7. Types of AI Agents
  8. What AI Agents Can Do Today
  9. When to Use an AI Agent
  10. Common Failure Modes

The article lives on outcomeschool.com. Read it there, then come back: the tutor in the margin has read it and will answer questions, and the questions below check what stayed.

Before you go

In one sentence, what was this chapter about?

From memory, without scrolling up. Writing it is what makes it yours; the grade is only to show you what you had.

How sure?