This week, leaders of Google, OpenAI, Anthropic, Meta, xAI and Nvidia signed the White House Accord on Super Intelligence. The companies committed to four layers of oversight for frontier models: internal controls, an internal team that verifies them, an independent external auditor or evaluator, and an independent board committee. The commitments are voluntary for now, and the accord says they could eventually be written into law. Of the four layers, the outside assessment carries the most…