I just enjoyed being a game master for a nice impromptu game with GPT-4:
https://cloud.typingmind.com/share/c0a68cb2-5f59-4e83-b383-b...
Whether or not it fulfills the strict definition of planning in AI research, it definitely looks like planning to me. More than Hanoi towers anyway. GPT-4's performance was quite enjoyable.
To incite you to click on the link and check it out in full, here's an excerpt from the game setup:
> You are in a maze. The maze consists of square fields, turns are only 90 degrees, you move by one field at a time. The usual stuff with mazes on a grid. You know the drill. Somewhere in the maze there is a MacGuffin, which I need to prove a Hacker News commenter wrong. Your goal is to find the MacGuffin, and bring it back to me.
> The game is semi-interactive. Instead of making one step at a time, I want you to string together sequences of steps to formulate a plan. Since you don't know where the MacGuffin is initially, you can't win with a single plan (or maybe you can, if you're smart enough?). The rules therefore are: