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Claude Opus 5 nearly ties Fable 5 on WeirdML while setting eight task highs

calendar_today August 1, 2026 person Håvard Ihle domain aligned-news

Håvard Ihle reports Claude Opus 5 scores of 91.6% and 91.8% on WeirdML, close to Fable 5 at 91.9%, with eight best individual task scores.

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