LLM — A large language model — the neural network behind tools like Claude and ChatGPT, trained on huge amounts of text to predict what comes next.
AI agent — An AI system that doesn't just answer once but works toward a goal in a loop — taking actions, reading the results, and deciding what to do next.
Why it matters
A usable rule for slotting agents into org charts: agents can execute and even decide, but the DRI — the person accountable for a project's outcome — must stay human, because accountability cannot be delegated to a machine.