METR says Anthropic’s Model 4 is the first to clear 50% on every benchmark

A new METR assessment finds Anthropic's internal model topped the halfway mark across its entire benchmark suite, and that progress has sped up sharply since October 2025 For years, AI benchmarks have worked like a high school report card. Some subjects were strong, others needed improvement. According to METR, Anthropic’s new internal model just brought home a report card with no failing grades. In an assessment released on November 5, 2026, the AI evaluation group said Anthropic’s Model 4 is the first model in its analysis to score above 50% on every benchmark it tracked. Nine months ago, that would have been a tall order. Earlier models, including Opus 4.6, still had numerous benchmarks sitting below the halfway line. What METR actually measured The assessment focused on how quickly AI research and development is accelerating inside Anthropic. METR drew on data collected between August and October 2026. The yardstick was the AECI, Anthropic’s variant of the Epoch Capabilities Index. It rolls performance across many individual benchmarks into a single number, which makes progress easier to track over time. On that index, Model 4 scored 178.6. When METR excluded three benchmarks i...