SHADE-Arena: Evaluating Sabotage and Monitoring in LLM Agents
Jun 16, 2025

Summary
Introduced SHADE-Arena, a new evaluation suite for assessing sabotage and monitoring capabilities in LLM agents. SHADE-Arena features complex, multi-step tasks with paired malicious side tasks designed to test an agent's ability to perform harmful actions surreptitiously. The framework also includes a monitoring AI to detect these side tasks. The post details initial results from testing fourteen AI models, highlighting low sabotage success rates but also the challenges in effective monitoring, with a high false positive rate for the best monitors. It also explores the impact of revealing the agent's thought process and the effectiveness of hints on sabotage and monitoring performance.
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