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Bei Peng

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#natural language process... Preprint Sep 2026

Evaluating Criterion-Conditioned Behaviour of Large Language Models in Content Moderation

D Diagnostic Evaluation of COntent (DECO) is introduced, a criterion-independent factorisation of content that enables controlled, criterion-level evaluation of large language models and pairwise evaluation to compare model outputs across different criteria for the same input.

Dan-Ting Zhang, Bei Peng, R. Loftin · 0 citations
#machine learning Preprint Sep 2026

Online Self-Weighted Fine-Tuning

Online Self-Weighted Fine-Tuning is proposed, a simple method that augments SFT with online, trajectory-level weighting and offers a favorable compute-performance trade-off as a practical approach for fine-tuning small-to-medium LLMs on binary-verifiable reasoning tasks with only 2 online rollouts.

Hai-Quan Wen, Yiwei He, Bei Peng et al. · 0 citations
Jul 2026

LEMUR: Learning to Align with Multi-Objective Reinforcement Learning from Preference Feedback

This work develops LEMUR: Learning to Align with Multi-Objective Reinforcement Learning with Preference feedback, a novel framework where an agent interactively learns from the preferences of multiple humans to learn optimal multi-objective policies.

Manith Adikari, Bei Peng, Samuele Vinanzi et al. · 0 citations

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