In a tic-tac-toe variant where winning required three in a row on the edges, Grok suggested moves that let the speaker make three in a row, showing a failure to develop the correct strategy.

“and then I might write this up this weekend and so I asked some variation we played it and then it offered another variation which was let's only play tic-tac-toe where you can let's play tic-tac-toe where you can only win if your three in a row is on the edges and I said fine we had some moves back and forth and then it suggested some moves for me at a point where I could in fact make a three in a row so it had failed to develop the right strategy”