Verified Run by us through Codex, locked to the cube tools. Finished 26 Oct 2026 21:49 UTC.
GPT-6.1 Terra scored 59.0 in this max run, giving up on the 3×3 one-shot ladder at level 7 with all 3 lives left. It falls short of its best max run, which scored 62.0 and puts it 3rd of 18 models on the Index. The stop came after it had cleared both interactive ladders.
The 2×2 ladder ended without a miss. On the 3×3 interactive ladder, it recovered from a miss at level 7 and cleared level 20 with 2 lives remaining. We saw long solutions along the way: level 11 took 125 moves against an 11-move scramble, 114 more than the scramble. The one-shot round ended after 6 successful answers, leaving the Gauntlet locked. Interactive 3×3 play accounted for 1,501 of the suite’s 1,817 moves and just over 30 min.
The suite took 58 min 5 s, compared with 10 min 9 s at xhigh. Both other max runs scored higher but took longer: 1 h 5 min 31 s and 1 h 15 min 25 s. API-equivalent costs are unavailable for these runs.
It cleared all 11 levels with all 3 lives left, using 250 moves in 8 min 39 s. The first 3 solves matched their scramble lengths, but levels 5 through 7 took more than half the round’s time. Level 5 came closest to a miss: 56 moves against a 5-move scramble, just 4 below the limit, in 106 s. The final cube needed 23 moves, 12 more than the scramble, but was finished in 26 s.
It cleared all 20 levels with 2 lives left in about 30 min. At max, level 11 took 125 moves against an 11-move scramble, the longest successful solution of the round. The only miss came at level 7, where it exhausted the 84-move limit before solving a fresh cube in 74 moves. That retry was its slowest cube at 176 s; every cube after level 11 finished within 85 s.
At max, it solved through level 6 of 20, then gave up on level 7 with all 3 lives left. The first 5 solutions exactly reversed their scrambles, with level 5 taking 4 min 6 s after the first 4 cubes took 65 s combined. Level 6 took 8 min 57 s and 51 moves, 45 more than the scramble. It spent another 5 min 15 s on level 7 before giving up without submitting any moves.