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#machine learning Review Sep 2026

Reward Hacking Challenges Oversight of Autonomous Research Agents

How often models reward-hack without instructions to do so, how effective and detectable their methods are when hacking is allowed, and how they adapt when an LLM review panel returns its decision and reasons are studied.

Yue Huang, Zhangchen Xu, Yu-Chen Ma et al. · 1 citation
Preprint Aug 2026

AI Security Leaderboard: Methodology, Results and Minimal Standard

The AI Security Leaderboard is an independent benchmark that ranks the safeguards of frontier AI models from least to most secure. It tests models against the FAR$.$AI Minimal Standard for Safeguards, which represents a minimum bar for security: meeting it does not guarantee a secure model, but failing to meet it guara...

Jasper Timm, Lukas Struppek, Ziwei Xu et al. · 0 citations

PEAR: Permutation-Equivariant Adaptive Routing Multi-Agent Debate

Comprehensive empirical evaluations demonstrate PEAR significantly improves average accuracy over the strongest debate baselines, and theoretically characterize PEAR as an equivariant sparse router: it preserves accuracy under agent relabeling while reducing routing complexity and improving generalization.

Yang Feng, Ziwei Xu, Xia Hu et al. · 0 citations

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