tCode compared with tAI in the browser
tCode is not a replacement for the browser, it is the same account and the same models reached through a different surface, chosen for a different shape of task. A question with no real dependency on a specific project, a piece of writing, a general explanation, a quick sanity check, is often still just as easy, or easier, in the browser.
The moment a task actually depends on the state of a real project on disk, tCode becomes the faster path, purely because it removes the copying: it already has the file, it can already run the command, there is nothing to relay back and forth by hand.
In practice, most people end up using both, switching based on what the specific question in front of them actually needs rather than picking one as a permanent default. Neither surface is trying to be the only way in.
A useful rough test: if you could answer the question yourself just as easily by pasting a snippet into the browser as by having tCode look at the real file, the browser is probably the faster path for that specific question. The moment that stops being true, the balance tips toward tCode.
Both surfaces read from the same account-level memory, so anything tAI has been asked to remember about how you like to work carries over automatically regardless of which one you happen to be using. A specific in-progress conversation itself does not follow you between the two, a browser chat and a tCode session are separate threads, but the standing context that makes either one useful does. See Accounts and API access for exactly what is shared.