(I work at OpenAI.)

Per https://news.ycombinator.com/item?id=21306452, we have results for both instrumented and uninstrumented cubes!

Our cube variants are listed in the blog post ("Behind the scenes: Rubik’s Cube prototypes"), and results are in the paper in Table 6.

According to the Table 6, the performance of not instrumented cube is 20% for applying half of a fair scramble and 0% for a full scramble. Right?

Yes — but note that "success" is a not-very-granular metric (which we set for ourselves!), as it means fully unscrambling the cube without dropping it once.

To be clear, that means executing up to 100 moves without a drop. If you put the cube back in the robot's hand, without any additional effort it'll continue solving unfazed.

There was no uninstrumented cubes. What OpenAI claims to be a "regular Rubik's cube" is in fact not regular, but has color stickers cut. OpenAI couldn't get regular Rubik's cube working.

The video they released hinted at instrumenting but I thought it was for validation purposes only. Interesting, thanks.