t11: Messy money -- GPT-6.1 Sol vs Claude Opus 5.5
Match up messy invoice, bank and card exports in Python and report one clean summary.
Opus: 67.7 s. Sol: 374.6 s. Sol took 5.5 times as long.
Opus (s)Sol (s)
Hidden tests: Opus 16 of 16, Sol 16 of 16.
Blind judge pick: Opus (clear).
"Solution A [Opus] avoids a common locale-dependent bug by manually parsing month abbreviations instead of relying on `strptime` with `%b`. It also handles malformed CSVs (like blank lines or missing fields) more gracefully and avoids overcomplicating the Decimal precision context."
"An exceptionally robust and well-tested solution that handles all edge cases, including Decimal precision and date-based rate fallbacks, perfectly."