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Expanding Large Language Models~(LLMs) to new languages is a costly endeavor, demanding extensive Continued Pre-Training~(CPT) and data-intensive alignment. While recent data-free merging techniques attempt to bypass alignment by fusing a…

Computation and Language · Computer Science 2026-05-19 Hao Zhou , Tianhao Li , Zhijun Wang , Shuaijie She , Linjuan Wu , Hao-Ran Wei , Baosong Yang , Jiajun Chen , Shujian Huang

Large Language Models (LLMs) based on Mixture-of-Experts (MoE) are pivotal in industrial applications for their ability to scale performance efficiently. However, standard MoEs enforce uniform expert sizes,creating a rigidity that fails to…

Computation and Language · Computer Science 2026-04-29 Zhicheng Ma , Xiang Liu , Zhaoxiang Liu , Ning Wang , Yi Shen , Kai Wang , Shuming Shi , Shiguo Lian

Mixture of Experts (MoEs) have become a central component of many state-of-the-art open-source and proprietary large language models. Despite their widespread adoption, it remains unclear how close existing MoE architectures are to optimal…

The Mixture-of-Experts (MoE) layer, a sparsely-activated model controlled by a router, has achieved great success in deep learning. However, the understanding of such architecture remains elusive. In this paper, we formally study how the…

Machine Learning · Computer Science 2022-08-05 Zixiang Chen , Yihe Deng , Yue Wu , Quanquan Gu , Yuanzhi Li

Mixture-of-Experts (MoE) has become a prominent paradigm for scaling Large Language Models (LLMs). Parameter-efficient fine-tuning methods, such as LoRA, are widely adopted to adapt pretrained MoE LLMs to downstream tasks. However, existing…

Artificial Intelligence · Computer Science 2026-04-03 Guanzhi Deng , Bo Li , Ronghao Chen , Xiujin Liu , Zhuo Han , Huacan Wang , Lijie Wen , Linqi Song

One of the primary challenges in optimizing large language models (LLMs) for long-context inference lies in the high memory consumption of the Key-Value (KV) cache. Existing approaches, such as quantization, have demonstrated promising…

Computer Vision and Pattern Recognition · Computer Science 2025-06-10 Wei Tao , Haocheng Lu , Xiaoyang Qu , Bin Zhang , Kai Lu , Jiguang Wan , Jianzong Wang

The Mixtures-of-Experts (MoE) model is a widespread distributed and integrated learning method for large language models (LLM), which is favored due to its ability to sparsify and expand models efficiently. However, the performance of MoE…

Machine Learning · Computer Science 2024-05-24 Jing Li , Zhijie Sun , Xuan He , Li Zeng , Yi Lin , Entong Li , Binfan Zheng , Rongqian Zhao , Xin Chen

Mixture-of-Experts (MoE) architectures are widely used in modern large language models and multimodal models. However, inference efficiency is often limited by highly dynamic and skewed expert workloads across different modalities. During…

Distributed, Parallel, and Cluster Computing · Computer Science 2026-05-12 Yingping Wang , Yi Wu , Xiangyu Wu , Junwei Cui , Weilin Cai , Zhijiang Guo , Jiayi Huang

Mixture-of-Experts (MoE) architectures have become standard in large language models, yet many of their core design choices - expert count, granularity, shared experts, load balancing, token dropping - have only been studied one or two at a…

Machine Learning · Computer Science 2026-05-13 Margaret Li , Sneha Kudugunta , Danielle Rothermel , Luke Zettlemoyer

By increasing model parameters but activating them sparsely when performing a task, the use of Mixture-of-Experts (MoE) architecture significantly improves the performance of Large Language Models (LLMs) without increasing the inference…

Computation and Language · Computer Science 2025-06-10 Zeliang Zhang , Xiaodong Liu , Hao Cheng , Chenliang Xu , Jianfeng Gao

The powerfulness of LLMs indicates that deploying various LLMs with different scales and architectures on end, edge, and cloud to satisfy different requirements and adaptive heterogeneous hardware is the critical way to achieve ubiquitous…

Networking and Internet Architecture · Computer Science 2025-02-13 Ning Li , Song Guo , Tuo Zhang , Muqing Li , Zicong Hong , Qihua Zhou , Xin Yuan , Haijun Zhang

Multimodal Large Language Models (MLLMs) have achieved success across various domains. However, their applicability tends to degrade when confronted with different types of data inputs, especially for MLLMs that have been fine-tuned for…

Computation and Language · Computer Science 2025-07-02 Yang Dai , Jianxiang An , Tianwei Lin , Hongyang He , Hongzhe Huang , Wenqiao Zhang , Zheqi Lv , Siliang Tang , Yueting Zhuang

Building mixture-of-experts (MoE) architecture for Low-rank adaptation (LoRA) is emerging as a potential direction in parameter-efficient fine-tuning (PEFT) for its modular design and remarkable performance. However, simply stacking the…

Machine Learning · Computer Science 2025-07-22 Jinyuan Feng , Zhiqiang Pu , Tianyi Hu , Dongmin Li , Xiaolin Ai , Huimu Wang

As the capabilities of large language models (LLMs) continue to expand, aligning these models with human values remains a significant challenge. Recent studies show that reasoning abilities contribute significantly to model safety, while…

Computation and Language · Computer Science 2025-06-03 Zhili Liu , Yunhao Gou , Kai Chen , Lanqing Hong , Jiahui Gao , Fei Mi , Yu Zhang , Zhenguo Li , Xin Jiang , Qun Liu , James T. Kwok

Multimodal large language models (MLLMs) have demonstrated impressive capabilities across various vision-language tasks. However, a generalist MLLM typically underperforms compared with a specialist MLLM on most VL tasks, which can be…

Computer Vision and Pattern Recognition · Computer Science 2024-07-18 Leyang Shen , Gongwei Chen , Rui Shao , Weili Guan , Liqiang Nie

Large multi-modal models (LMMs) exhibit remarkable performance across numerous tasks. However, generalist LMMs often suffer from performance degradation when tuned over a large collection of tasks. Recent research suggests that Mixture of…

Computer Vision and Pattern Recognition · Computer Science 2024-04-04 Jialin Wu , Xia Hu , Yaqing Wang , Bo Pang , Radu Soricut

Mixture of Experts (MoE) models enable parameter-efficient scaling through sparse expert activations, yet optimizing their inference and memory costs remains challenging due to limited understanding of their specialization behavior. We…

Machine Learning · Computer Science 2026-03-09 Marmik Chaudhari , Idhant Gulati , Nishkal Hundia , Pranav Karra , Shivam Raval

Retrieval-Augmented Generation (RAG) significantly improved the ability of Large Language Models (LLMs) to solve knowledge-intensive tasks. While existing research seeks to enhance RAG performance by retrieving higher-quality documents or…

Artificial Intelligence · Computer Science 2024-10-22 Xin Zhou , Ping Nie , Yiwen Guo , Haojie Wei , Zhanqiu Zhang , Pasquale Minervini , Ruotian Ma , Tao Gui , Qi Zhang , Xuanjing Huang

Pretraining on a large-scale corpus has become a standard method to build general language models (LMs). Adapting a model to new data distributions targeting different downstream tasks poses significant challenges. Naive fine-tuning may…

Computation and Language · Computer Science 2023-05-23 Wuyang Chen , Yanqi Zhou , Nan Du , Yanping Huang , James Laudon , Zhifeng Chen , Claire Cu

Mixture-of-experts (MoE) architectures used in large language models (LLMs) achieve state-of-the-art performance across diverse tasks yet face practical challenges such as deployment complexity and low activation efficiency. Expert pruning…

Machine Learning · Computer Science 2025-12-23 Xican Yang , Yuanhe Tian , Yan Song