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cs.CL2026

Unsupervised Post-Training of Foundation Models: A Survey

Yijie Xu, Qianyi Cai, Huizai Yao +9

Foundation-model post-training usually relies on human labels, preference data, stronger teachers, or executable verifiers. We study Unsupervised Post-Training (UPT): update-bearin…

cs.CL2026

LazyTrain: Limited-resource Allocation toward Zero-waste Yield Optimization in Large Language Model Training

Xiaojun Wu, Cehao Yang, Honghao Liu +5

Training large language models on limited hardware is increasingly a scheduling problem across GPU compute, host memory, PCIe transfer, and storage bandwidth. Existing offloading s…

cs.CL2026

Bayesian-Agent: Posterior-Guided Skill Evolution Across LLM Agent Harnesses

Xiaojun Wu, Cehao Yang, Honghao Liu +7

LLM agents increasingly rely on prompts, tools, memory, SOPs, skills, and harness feedback, yet current self-evolution pipelines often update these assets through heuristic reflect…

cs.IR2026

LLM-Oriented Information Retrieval: A Denoising-First Perspective

Lu Dai, Liang Sun, Fanpu Cao +4

Modern information retrieval (IR) is no longer consumed primarily by humans but increasingly by large language models (LLMs) via retrieval-augmented generation (RAG) and agentic se…

cs.LG2026

DataArc-SynData-Toolkit: A Unified Closed-Loop Framework for Multi-Path, Multimodal, and Multilingual Data Synthesis

Zhichao Shi, Cehao Yang, Hao Zhou +6

Synthetic data has emerged as a crucial solution to the data scarcity bottleneck in large language models (LLMs), particularly for specialized domains and low-resource languages. H…

cs.CR2026

Conflicts Make Large Reasoning Models Vulnerable to Attacks

Honghao Liu, Chengjin Xu, Xuhui Jiang +5

Large Reasoning Models (LRMs) have achieved remarkable performance across diverse domains, yet their decision-making under conflicting objectives remains insufficiently understood.…