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Hongyi Wen

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#artificial intelligence Preprint Oct 2026

Distributionally Robust Mixture-of-Experts Training

Mixture-of-Experts (MoE) transformers scale capacity by activating only a few experts per token, but this sparsity creates a hidden reliability problem: when routing is imperfect, load-balanced models may send tokens to experts that are insufficiently trained for the assigned inputs. We propose Distributionally Robust...

Xin Teng, Mu-Xi Li, Hong-Yi Wen · 0 citations
#artificial intelligence Preprint Jun 2026

NovelAPIBench: Diagnosing How A Code LLM Learns to Use Novel APIs

NovelAPIBench is presented, an automated diagnostic framework that builds benchmarks around the API knowledge gaps of a target model, identifies novel APIs, generates executable coding tasks with separately controllable knowledge components, and classifies failures into six categories.

Jin-Nuo Liu, Yue Peng, Jin-Hang Niu et al. · 0 citations
#artificial intelligence Preprint Aug 2026

Toward Latent Language Model Skills Steering and Optimization: An Empirical Study

This empirical study investigates whether procedural LLM skills can be represented as directions in activation space and whether vector-space operations over these directions can express skill-level behaviors and finds that procedural skills admit a vector-space representation.

Xun-Yi Jiang, Jun-Da Wu, Yuxin Xiong et al. · 0 citations

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