Claude Opus 5 Beats Human Accountants in 10-Minute Test, Musk Reacts

Brief By Twitter X / 12:17 PM on 03 Oct 2026

Anthropic’s Claude Opus 5 reportedly outperformed 12 licensed accountants in an accounting study by AI recruiting firm Mercor, completing every task in under 10 minutes. Human participants averaged 37% accuracy, while Opus 5 achieved 100% across 20 attempts. Elon Musk reacted to the findings, saying that “Super Intelligence” is now acing accounting tests in the study, highlighting rapid AI progress.