Anthropic's AI Models Show Accelerated Improvement, Raising Questions About AI Development Speed
METR, an independent AI evaluation organization, reported on November 5, 2026, that Anthropic's AI models are improving at an estimated 1.9 times the rate observed before October 2025, with a confidence range of 1.5 to 2.8 times. This assessment was conducted internally at Anthropic between August 12 and October 29, 2026, with METR staff having access to the company's internal training data, unreleased model scores, and interviews with staff. The primary goal of this evaluation was to determine if AI development itself is accelerating, a phenomenon that METR suggests could lead to the rapid emergence of advanced and potentially risky AI capabilities. Anthropic itself identifies such acceleration as a key risk indicator within its Responsible Scaling Policy. METR stated that it did not receive payment for this evaluation. The report indicates that the observed shift is roughly equivalent to two years of historical progress achieved within the past year, though METR acknowledges that the true acceleration co...