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cs.LG2026

HalluGuard: Demystifying Data-Driven and Reasoning-Driven Hallucinations in LLMs

Xinyue Zeng, Junhong Lin, Yujun Yan +4

The reliability of Large Language Models (LLMs) in high-stakes domains such as healthcare, law, and scientific discovery is often compromised by hallucinations. These failures typi…

cs.LG2026

Plan and Budget: Effective and Efficient Test-Time Scaling on Reasoning Large Language Models

Junhong Lin, Xinyue Zeng, Jie Zhu +4

Large Language Models (LLMs) have achieved remarkable success in complex reasoning tasks, but their inference remains computationally inefficient. We observe a common failure mode…

cs.LG2025

Data Value in the Age of Scaling: Understanding LLM Scaling Dynamics Under Real-Synthetic Data Mixtures

Haohui Wang, Jingyuan Qi, Jianpeng Chen +9

The rapid progress of large language models (LLMs) is fueled by the growing reliance on datasets that blend real and synthetic data. While synthetic data offers scalability and cos…

cs.LG2025

Reasoning Language Model Inference Serving Unveiled: An Empirical Study

Qi Li, Junpan Wu, Xiang Liu +6

The reasoning large language model (RLLM) has been proven competitive in solving complex reasoning tasks such as mathematics, coding, compared to general LLM. However, the serving…

cs.LG2025

LENSLLM: Unveiling Fine-Tuning Dynamics for LLM Selection

Xinyue Zeng, Haohui Wang, Junhong Lin +3

The proliferation of open-sourced Large Language Models (LLMs) and diverse downstream tasks necessitates efficient model selection, given the impracticality of fine-tuning all cand…