Headlines mash these together. Keep them in three buckets. You only need the first one to finish Ring 0.
Chat
You type. It replies. One turn, then another. Nothing else moves unless you copy it somewhere.
Tools
The model may look something up, format a file, or run a calculator — still waiting on you between steps.
Agents
A chain of steps toward a goal. Useful later. In this product, nothing acts without your approval. Ring 2 is a later map, not this week.
Software that tries a sequence of steps toward a goal (search, draft, click) instead of a single reply. “Agent” does not mean it is allowed to send, spend, or post for you.