METR estimates Anthropic's AI progress is roughly twice its earlier pace, mostly due to AI doing R&D, and says Anthropic redacted most key evidence.
Research: Independent Assessment of AI R&D Acceleration at Anthropic in October 2026
What it means for youAn outside group says one leading AI company is now improving its models about twice as fast as before, largely because its own AI helps build the next AI.
For lawmakersMETR says Anthropic redacted most of the evidence behind its conclusions, so regulators and the public must rely on METR's judgment rather than checking the evidence themselves.
For researchersMETR gives a 1.9x acceleration in Anthropic's benchmark index (95% interval 1.5-2.8x), with stated risks of both over- and under-estimating, and no clear bottleneck found.
“While we were able to freely share our highest-level conclusions about risk, Anthropic redacted a majority of the evidence we found most informative for these conclusions.”
METR's redaction summary at the top of the report.