Claude Opus 5.5 on Gentle grid 6
Solved: 52 of 52 blank cells right. It said it was 99% sure. All of Claude Opus 5.5's answers.
RESULTSolved
CELLS RIGHT52 / 52
SAID99% sure
MODEL TIME1.0 min
COST$0.143 (API-equivalent)
TOKENS IN / OUT912 / 6,795
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9
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9
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9
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6
5 given 5 filled correctly 53 wrong, with the right digit 3 left empty
The end of its reply
<grid> 534987261 927146853 861523749 173295684 245861397 698374512 719652438 486739125 352418976 </grid> <confidence>99</confidence> I solved this by hand with candidate elimination; every given digit is kept. I checked that all nine rows and all nine columns contain 1 to 9 exactly once. I did not re-check the 3x3 boxes separately after finishing.
Grid gentle-5 of set v1, 29 givens. Puzzle as one line: ....87..1.2..4....86.5.37..1.....68..4..6..9..98.....2..96.2.38....3..2.3..41....