Frontier AI Auditing: Toward Rigorous Third-Party Assessment of Safety and Security Practices at Leading AI Companies. - Miles Brundage; Noemi Dreksler; Aidan Homewood; Sean McGregor; Patricia Paskov; Conrad Stosz; Girish Sastry; A. Feder Cooper; George Balston; Steven Adler; Stephen Casper; Markus Anderljung; et al. (CoRR, 2026)