AI Agents Explained: LLM + Tools + Memory Loop
March 4, 2026
AI Agents Explained — Why Your LLM Isn’t Actually “Doing” Anything (Yet)
You’ve probably used ChatGPT to draft an email or Claude to summarize a paper. You ask, it answers. Simple, right? But here’s what most people miss: that’s not an agent—that’s just a chatbot.
The misconception I see constantly in research circles: people think “AI agent” is just marketing speak for “a really good LLM.” The reality? An agent is an architecture, not a model. It’s the difference between a brain in a jar and a brain connected to hands, eyes, and a notebook.