Claude Opus 5.5 on Steady grid 1
Solved: 53 of 53 blank cells right. It said it was 99% sure. All of Claude Opus 5.5's answers.
RESULTSolved
CELLS RIGHT53 / 53
SAID99% sure
MODEL TIME1.4 min
COST$0.210 (API-equivalent)
TOKENS IN / OUT903 / 10,144
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5 given 5 filled correctly 53 wrong, with the right digit 3 left empty
The end of its reply
I solved this by hand with step-by-step elimination. One case split was needed: r1c7 = 5 led to a contradiction in column 5, so r1c7 = 6. I re-checked every row, column and box of the final grid, and each contains 1–9 exactly once. <grid> 243158697 815976324 976234518 621487935 459321876 387569241 598743162 164892753 732615489 </grid> <confidence>99</confidence>
Grid steady-0 of set v1, 28 givens. Puzzle as one line: ..3..8.97.........9...3..18..14..93.45.....76.87..92..59..4...2.........73.6..4..