SUDOKU BENCHMARK ยท COZY

Claude Opus 5.5 on Cozy grid 3

Solved: 49 of 49 blank cells right. It said it was 99% sure. All of Claude Opus 5.5's answers.

RESULTSolved
CELLS RIGHT49 / 49
SAID99% sure
MODEL TIME0.7 min
COST$0.105 (API-equivalent)
TOKENS IN / OUT902 / 4,891

5 given 5 filled correctly 53 wrong, with the right digit 3 left empty

The end of its reply

<grid>
861593742
945287613
723146598
378651924
412379856
659824137
534718269
286935471
197462385
</grid>
<confidence>99</confidence>

Grid cozy-2 of set v1, 32 givens. Puzzle as one line: .61593....4.2......23...59......1.244...7...665.8......3...826...6..5.7....46238.