An A.I. Agent is an L.L.M. call inside a for loop with a definite end state/goal. Basically a state machine.

An A.G.I. is a long running process (perhaps a daemon even) with access to disk based memory, a callback and trigger point for agentic invocation.

Inspired by note from @simonw: https://simonwillison.net/2025/Sep/18/agents/

~ updated at: 2025-09-20T09:39:24.421Z