t02: Bug hunt -- GPT-6.1 Sol vs Claude Opus 5.5
Find and fix the hidden bugs in a small JavaScript helper library. The visible tests already pass.
Opus: 56.7 s. Sol: 402.2 s. Sol took 7.1 times as long.
Opus (s)Sol (s)
Hidden tests: Opus 10 of 10, Sol 10 of 10.
Blind judge pick: Sol (clear).
"B [Sol] caught the classic Date.UTC two-digit year bug (years 0-99 mapping to 1900-1999) and fixed it across all date functions. B [Sol] also handled edge cases more robustly, such as negative max lengths in truncate and extreme values in round, backed by exceptionally thorough tests."
"Excellent work fixing all the reported bugs with robust solutions and comprehensive tests."
"An excellent, comprehensive set of bug fixes with robust regression tests covering all edge cases."