Claude Opus 5 scores 20/20 on CPA tasks while 12 licensed accountants top out near 90%

rohanpaul_ai · x · 2026-10-02

A cited benchmark comparison shows Claude Opus 5 acing 20 out of 20 tax/accounting tasks in minutes, while 12 licensed CPAs scored anywhere from 0% to about 90%, with several running out the 3-hour clock. The author's takeaway: rule-based work is no longer a career, it's a prompt—humans are now the slow, expensive, error-prone option in rule-based professions.

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