Red-Teaming OpenAI's Internal Agent Monitoring Systems

[Also posted on the METR blog]For three weeks, from July 21st to August 11th, a METR employee and a Redwood Research employee conducted a pilot high-access exercise to stress-test OpenAI’s internal misalignment monitoring system.1 The output of this exercise was a 61-page internal report that was shared with OpenAI researchers and security staff,2 primarily focused on estimating the fraction of agentic inference that is monitored, and whether agents could in principle disable or subvert the moni...