We've left the Generative AI era and entered the Agentic AI era.
The models have gotten so good at tool calling in a loop that they can do something qualitatively different.
Chatbots are from the Generative AI era.
Tools like Claude Code are fundamentally agentic.
A couple of years ago people tried to wrap LLMs and create agents, but it was premature.
The model quality wasn't there yet.
So they concluded it wasn't possible.
But it just wasn't ready yet.
Now it is.
The chatbot form factor is not enough to convey that power.