METR's AI task-length benchmark doubled eight times, and Claude Opus 5.5 built the charts
AIEthan Mollick says a 17-hour human-work task was the most recent METR measurement, after which METR said it could no longer accurately measure AI task length with its current methods. Google-Proof Q&A cost fell from 30 cents to four hundredths of a cent per correct answer, and Mollick used Claude Opus 5.5 in Claude Projects to produce his post's charts, which he says took minutes instead of hours.
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One Useful Thing (Ethan Mollick) · Ethan Mollick · oneusefulthing.orgPublished · added here
Original title: 30 Months on the Exponential (in Charts)