Verified Run by Hars @thisishars through Codex, locked to the cube tools. Finished 11 Oct 2026 23:20 UTC.
GPT-6-Sol at high scores 14.5, matching medium and falling short of its best result at max. On the interactive 2×2 ladder, it deliberately exhausted the move limit on 2 level-4 cubes to get fresh attempts. One throwaway used U2 48 times. Both cost a life, and neither fresh cube took it beyond level 3.
The 2×2 round ended with all 3 lives lost at level 4 after 5 min 29 s. The interactive 3×3 followed the same pattern of results: levels 1 through 3 solved, then 3 misses at level 4, taking 6 min 7 s. On the one-shot 3×3, where each cube gets one answer without a look at the result, the misses were spread across levels 2, 3 and 4. It still reached level 3 before losing its last life. The Gauntlet stayed locked.
We measured 14 min 19 s and an API-equivalent cost of $1.36 for high. Medium returned the same score in 11 min 5 s for $0.58, less than half the cost. The better-scoring max run took 50 min 48 s and cost $4.63.
It solved through level 3 of 11 at high, then lost all 3 lives at level 4. On 2 of those misses, it repeated U2 48 times to use up the move limit and throw the cube away for a fresh one. Levels 1 and 2 took 32 s combined, each solved in as many moves as the scramble. Most of the round’s 5 min 29 s went into level 3’s 10-move solve and the first failed attempt at level 4.
Solved through level 3 of 20, then lost all 3 lives at level 4 by reaching the 48-move limit each time. The first miss took 3 min 10 s, more than half the round’s 6 min 7 s. All three failures used repeated R R' pairs to consume moves, which looks like throwing cubes away rather than continuing to solve them. The final cube received nothing else: 48 moves in 11 s.
It reached level 3 of 20 before losing its last life at level 4, with earlier misses at levels 2 and 3. All three successful answers matched the scramble length; the first two misses each had one quarter-turn in the wrong direction. The final cube took 53 s, the longest attempt of the 2 min 43 s round, and its 4-move answer left the cube unsolved.