According to an assessment released by METR on November 5, 2026, Anthropic’s Model 4 is the first to score above 50% on every test tracked by the organization. The model achieved a score of 178.6 on the AECI, rising to 179.7 when three potentially saturated benchmarks were excluded. The evaluation, conducted over 11 weeks with 2.5 full-time equivalents, indicates that Anthropic’s performance is advancing about 1.9 times faster than its historical rate since October 2025. METR attributes most of this acceleration to AI-assisted research and development, while noting that the model remains private and its results cannot yet be independently verified.
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