Inside the Three-Tier Evaluator Framework
Anthropic's October 15 announcement didn't just add one new auditor - it introduced a tiered governance structure for the first time. Tier 1 evaluators like SecureBio get narrowly scoped access to specific risk sections, currently the chem/bio-weapons portion of Anthropic's risk reports, and need company approval before publishing [1]. Tier 2, handled by Accenture's Faculty unit, runs broader evaluations and adversarial testing and can publish independently [2]. METR sits alone at Tier 3: the only evaluator with embedded, employee-like access - company hardware, office space, and tools 'roughly on par' with Anthropic's own risk assessment teams - layered on top of independent-publication rights [3]. Six METR staff were given this access, while the rest of METR's roughly 35-person organization [7], including staff working with Anthropic on separate projects, remains siloed from the embedded team's work under enforceable agreements [4].


