METR finds AI is accelerating Anthropic’s R&D roughly twofold

On November 5, 2026, the evaluation nonprofit METR published an 11-week audit of Anthropic and estimates its models are now improving 1.9 times faster than before October 2025, an acceleration mostly attributed to AI use in its own research. For teams that build or evaluate AI, it is the first independent evidence of a self-improvement loop at a frontier lab.