Also what I got. Then I tried changing "wash" to "repair" and "car wash" to "garage" and it's back to walking.

Am I the only one who thinks these people are monkey patching embarrassments as they go? I remember the r in strawberry thing they suddenly were able to solve, while then failing on raspberry.

We know. We know these things aren't determination. We know.

That you got different results is not surprising. LLMs are non-deterministic; which is both a strength and a weakness of LLMs.