Author

Chenfu Bao

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Preprint Oct 2026

Rethinking GRPO for Large Reasoning Model Safety Alignment

Large reasoning models (LRMs) exhibit strong reasoning capabilities but remain vulnerable to unsafe outputs. While Group Relative Policy Optimization (GRPO) is widely used for safety alignment, its group-relative optimization may provide insufficient safety-directed learning signals. In this paper, we identify two fail...

Jia-Wei Chen, Yi Zhang, Jia-Wei Du et al. · 0 citations

#artificial intelligence Apr 2026

HINTBench: Horizon-agent Intrinsic Non-attack Trajectory Benchmark

These findings establish intrinsic risk auditing as an open challenge for agent safety, where intrinsic failures remain latent, propagate across long-horizon execution, and eventually lead to high-consequence outcomes.

Jiacheng Wang, Jinchang Hou, Fabian Wang et al. · arXiv.org · 9 citations