Twelve Hours of AI Work, Seventy Minutes You Can Trust
by Brian Wang from NextBigFuture.com on (#77D64)
Claude Opus 4.6 can work for twelve hours. It can work reliably for seventy minutes. Mythos and likely Fable 5 can work for 16 hours at 50% correctness and 2-3 hours at 80%. Both numbers describe the same model doing the same kind of work, measured by the same organization. The gap between them is ...