Definition

Third-party safety evaluators given ongoing, employee-like access inside frontier AI labs — desks, badges, laptops, training-pipeline visibility — to verify safety practices, report incidents, and publish key findings without editorial control (subject to narrow security/legal redactions).

Key Points

Operational Tier (October 2026)

  • 2026-10-15: metr becomes first tier-3 evaluator at anthropic — six researchers with employee-like access and publication rights without veto (narrow redaction only); ties to White House Accord on Super Intelligence pledge (2026-10-15-anthropic-metr-employee-level-access)
  • SecureBio remains tier-1 (scoped reviews, Anthropic approval to publish); tier-2 can publish without approval with less internal access

First Named Partner (September 2026)

Sources