Guide

Building Effective AI Agents

Anthropic · anthropic.com

The most-cited definition of workflows vs agents, written by the team behind Claude.

Open on anthropic.com ↗

It answers 5 questions

  1. What actually is an AI agent, in plain language?
  2. What's the difference between automation (Zapier, n8n, Make) and AI agents?
  3. Why would a founder use agents instead of a chatbot or automation?
  4. What are the highest-ROI automations a startup should build first?
  5. Should I put an AI agent in my product, or is a simple workflow enough?

Read with it

  1. Video AI Agents, Clearly Explained Jeff Su
  2. A sober corporate reference for checking any claim you hear at a demo day. ibm.com Guide The 2026 Guide to AI Agents IBM
  3. Lays out the six behaviors that separate a real agent from an ordinary AI tool. lennysnewsletter.com Podcast Make product management fun again with AI agents Lenny's Podcast (Hamza Farooq, Jaya Rajwani)
  4. The expanded companion to Anthropic's canonical essay, packaged for non-engineers. resources.anthropic.com Guide Building Effective AI Agents (resource hub) Anthropic
  5. OpenAI's own plain-English playbook on what an agent is and when you need one. cdn.openai.com Guide A Practical Guide to Building Agents (PDF) OpenAI
  6. Three infra investors argue out the definition honestly, including where the hype ends. a16z.com Podcast What Is an AI Agent? a16z (Guido Appenzeller, Matt Bornstein, Yoko Li)
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