1) Codex Plus (20 bucks) - find it enough even though I'm working on 3 small-medium size projects and occasionally helps out my wife

2) No

3) Pi

4) No, I think these are token burners and makes it practically impossible to track what's happening from a human side.

5) My own tool: <https://github.com/PAndreew/pi_group> - the main benefit is that it's multiplayer so it functions as a regular chat app in which you can invoke Pi in a group chat. This way the agent can have a shared context, but it still have all the features like generative ui, internal browser etc. that other bolted-on solutions like Claude bots in Slack do not possess.