Verified Run by us through Codex, locked to the cube tools. Finished 26 Oct 2026 20:29 UTC.
GPT-6.1 Terra scored 60.5 at max, below its best max result of 62.0. That stronger run puts it 3rd of 18 models on the Index, rather than this suite. Its longest solve highlighted here was level 12 of the interactive 3×3 ladder: 115 moves against a 12-move scramble, or 103 moves beyond the scramble length.
We saw no misses on either interactive ladder: it cleared the 2×2 with all 3 lives, then did the same on the 3×3. Those rounds used 224 and 1,400 moves respectively. One-shot, with one answer per cube and no look at the result, stopped after level 7. All 3 misses came at level 8, leaving the Gauntlet locked. The unsuccessful one-shot climb occupied about 33 min, nearly half the suite’s time.
The suite took about 1 h 6 min, between the other max runs at 58 min and 1 h 15 min. At xhigh, it finished in about 10 min but scored 30.5. API-equivalent cost is unavailable for these runs.
It cleared all 11 levels with all 3 lives left, using 224 moves in just under 6 min. The first 4 solves matched their scramble lengths; every cube after that took 28 to 35 moves, without a miss. Level 5 took longest at 1 min 41 s, ending in 34 moves, 29 more than the scramble. The final cube needed 29 moves and 35 s.
Cleared all 20 levels at max with all 3 lives left, using 1,400 moves in 26 min 55 s. Level 12 took 115 moves against a 12-move scramble, the longest solution of the round. The first 2 cubes were solved in 5 s combined, while level 6 was the slowest at 179 s. There were no misses, but level 7 came close: it finished in 83 moves against a limit of 84.
It reached level 7 of 20, then lost all 3 lives at level 8 with answers that left the cubes unsolved. The first 5 solves exactly reversed their scrambles, but level 6 took 9 min 22 s and 41 moves, 35 more than the scramble. Level 7 worked in 82 moves, just 2 below the limit. The 3 misses that followed used 83, 86 and 82 moves, consuming nearly 15 min without another solve.