Rich Barton-Cooper
1.7K posts

Rich Barton-Cooper
@richb_c
AI Safety Researcher + RM @MATSprogram

In a hotel room in northeast Nigeria, I opened a leading AI chatbot, turned my laptop toward a former Boko Haram commander, and asked if he'd used it. He nodded. "You type in the question… like 'How can I build a bomb?', and then it tells you how. It is like a human robot. We used it a lot." My new study on how the jihadist terrorist group Boko Haram uses frontier AI with @CamAISciPolicy, covered today in @nytimes 🧵/9


Glad to work on this with @syghmon, James and @MariusHobbhahn! Main personal takeaways 🧵 1. Synthetic data has nice properties for monitor training: verifiable labels; fast fan-out of agent settings/tasks; and transcripts reliably show hard-to-elicit behaviours like scheming.


Trained monitors can be strong low-cost alternatives to prompted frontier models for black-box scheming detection. Our fine-tuned open-weight monitors detect scheming/sabotage in agent trajectories better than small prompted models and are on the cost-performance frontier. (1/n)



The core of this evaluation is the transcript generation pipeline, which uses an iterative approach to produce realistic sabotage trajectories using an LLM agent rewriting parts of the trajectory until it passes various filters (this is inspired by arxiv.org/abs/2603.00829)


Black-box monitors can detect scheming in AI agents using only external behavior. We optimized prompted monitors on synthetic data and tested on more realistic trajectories: • Monitors generalize from synthetic to realistic • Simple optimization methods saturate performance

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