A METR report indicates that Anthropic's AI capabilities have advanced approximately twice as fast. The author estimates this translates to roughly a tenfold efficiency gain for researchers.

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The author interprets the public METR report on Anthropic's accelerated R&D, suggesting that the threshold for 'dramatic acceleration driven by AI' in Anthropic's responsible expansion policy may have been crossed. The report found that between October 2025 and October 2026, Anthropic's capability advancement speed was about double that of the previous twelve months, measured by an internal Epoch Capabilities Index (AECI), though most supporting evidence has been redacted.

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