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The integration of reinforcement learning (RL) into large language models (LLMs) has opened new opportunities for recommender systems by eliciting reasoning and improving user preference modeling. However, RL-based LLM recommendation faces…

Information Retrieval · Computer Science 2026-02-05 Lin Wang , Yang Zhang , Jingfan Chen , Xiaoyan Zhao , Fengbin Zhu , Qing Li , Tat-Seng Chua

Recently, preference optimization methods such as DPO have significantly enhanced large language models (LLMs) in wide tasks including dialogue and question-answering. However, current methods fail to account for the varying difficulty…

Computation and Language · Computer Science 2024-12-31 Jingyuan Ma , Rui Li , Zheng Li , Lei Sha , Zhifang Sui

Recent work shows that in-context learning and optimization of in-context examples (ICE) can significantly improve the accuracy of large language models (LLMs) on a wide range of tasks, leading to an apparent consensus that ICE optimization…

Computation and Language · Computer Science 2024-06-07 Pragya Srivastava , Satvik Golechha , Amit Deshpande , Amit Sharma

In the domain of data science, the predictive tasks of classification, regression, and imputation of missing values are commonly encountered challenges associated with tabular data. This research endeavors to apply Large Language Models…

Machine Learning · Computer Science 2026-04-23 Yazheng Yang , Yuqi Wang , Yaxuan Li , Sankalok Sen , Lei Li , Lin Qiu , Qi Liu

The performance of large language models (LLMs) across diverse downstream applications is fundamentally governed by the quality and composition of their pretraining corpora. Existing domain reweighting algorithms primarily optimize data…

Machine Learning · Computer Science 2025-05-28 Simin Fan , Maria Ios Glarou , Martin Jaggi

Recent advances have demonstrated the effectiveness of Reinforcement Learning (RL) in improving the reasoning capabilities of Large Language Models (LLMs). However, existing works inevitably rely on high-quality instructions and verifiable…

Computation and Language · Computer Science 2026-01-27 Wenkai Fang , Shunyu Liu , Yang Zhou , Kongcheng Zhang , Tongya Zheng , Kaixuan Chen , Mingli Song , Dacheng Tao

Recently, there has been a growing interest in leveraging Large Language Models (LLMs) for recommendation systems, which usually adapt a pre-trained LLM to the recommendation scenario through supervised fine-tuning (SFT). However, both the…

Information Retrieval · Computer Science 2024-10-17 Jiayi Liao , Xiangnan He , Ruobing Xie , Jiancan Wu , Yancheng Yuan , Xingwu Sun , Zhanhui Kang , Xiang Wang

We study the design decisions of publicly available instruction tuning methods, and break down the development of Flan 2022 (Chung et al., 2022). Through careful ablation studies on the Flan Collection of tasks and methods, we tease apart…

Artificial Intelligence · Computer Science 2023-02-15 Shayne Longpre , Le Hou , Tu Vu , Albert Webson , Hyung Won Chung , Yi Tay , Denny Zhou , Quoc V. Le , Barret Zoph , Jason Wei , Adam Roberts

High-quality and diverse multimodal data are essential for improving vision-language models (VLMs), yet existing datasets often contain noisy, redundant, and poorly aligned samples. To address these problems, data filtering is commonly used…

Computer Vision and Pattern Recognition · Computer Science 2026-04-21 Biao Wu , Yiwu Zhong , Meng Fang , Ling Chen

Alignment of Large Language Models (LLMs) aims to align outputs with human preferences, and personalized alignment further adapts models to individual users. This relies on personalized reward models that capture user-specific preferences…

Computation and Language · Computer Science 2026-04-21 Hongru Cai , Yongqi Li , Tiezheng Yu , Fengbin Zhu , Wenjie Wang , Fuli Feng , Wenjie Li

In this paper, we investigate preference-based reinforcement learning (PbRL), which enables reinforcement learning (RL) agents to learn from human feedback. This is particularly valuable when defining a fine-grain reward function is not…

Machine Learning · Computer Science 2025-11-11 Guojian Wang , Jianxiang Liu , Xinyuan Li , Faguo Wu , Xiao Zhang , Tianyuan Chen , Xuyang Chen

The training paradigm integrating large language models (LLM) is gradually reshaping sequential recommender systems (SRS) and has shown promising results. However, most existing LLM-enhanced methods rely on rich textual information on the…

Information Retrieval · Computer Science 2024-10-17 Dugang Liu , Shenxian Xian , Xiaolin Lin , Xiaolian Zhang , Hong Zhu , Yuan Fang , Zhen Chen , Zhong Ming

Instruction tuning is critical for adapting large language models (LLMs) to downstream tasks, and recent studies have demonstrated that small amounts of human-curated data can outperform larger datasets, challenging traditional data scaling…

Computation and Language · Computer Science 2025-03-07 Jinlong Pang , Jiaheng Wei , Ankit Parag Shah , Zhaowei Zhu , Yaxuan Wang , Chen Qian , Yang Liu , Yujia Bao , Wei Wei

Large Language Models (LLMs) employ multi-turn interaction as a fundamental paradigm for completing complex tasks. However, their performance often degrades in extended interactions, as they are typically trained on static, single-turn…

Computation and Language · Computer Science 2026-03-03 Chenxing Wei , Hong Wang , Ying He , Fei Yu , Yao Shu

Tables are a fundamental medium for organizing and analyzing data, making table reasoning a critical capability for intelligent systems. Although large language models (LLMs) exhibit strong general reasoning abilities, they still struggle…

Artificial Intelligence · Computer Science 2026-03-24 Lang Cao , Jingxian Xu , Hanbing Liu , Jinyu Wang , Mengyu Zhou , Haoyu Dong , Shi Han , Dongmei Zhang

Recent advancements highlight the success of instruction tuning with large language models (LLMs) utilizing Chain-of-Thought (CoT) data for mathematical reasoning tasks. Despite the fine-tuned LLMs, challenges persist, such as incorrect,…

Computation and Language · Computer Science 2024-03-28 Yongwei Zhou , Tiejun Zhao

Recently, the number of off-the-shelf Large Language Models (LLMs) has exploded with many open-source options. This creates a diverse landscape regarding both serving options (e.g., inference on local hardware vs remote LLM APIs) and model…

Machine Learning · Computer Science 2024-12-18 Dimitrios Sikeridis , Dennis Ramdass , Pranay Pareek

To meet the requirements of real-world applications, it is essential to control generations of large language models (LLMs). Prior research has tried to introduce reinforcement learning (RL) into controllable text generation while most…

Computation and Language · Computer Science 2024-03-19 Wendi Li , Wei Wei , Kaihe Xu , Wenfeng Xie , Dangyang Chen , Yu Cheng

Large Language Models have demonstrated outstanding performance across various downstream tasks and have been widely applied in multiple scenarios. Human-annotated preference data is used for training to further improve LLMs' performance,…

Computation and Language · Computer Science 2025-03-06 Shimao Zhang , Xiao Liu , Xin Zhang , Junxiao Liu , Zheheng Luo , Shujian Huang , Yeyun Gong

The development of Large Language Models (LLMs) often confronts challenges stemming from the heavy reliance on human annotators in the reinforcement learning with human feedback (RLHF) framework, or the frequent and costly external queries…

Computation and Language · Computer Science 2025-03-04 Shangding Gu , Alois Knoll , Ming Jin