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The success of pretrain-finetune paradigm brings about the release of numerous model weights. In this case, merging models finetuned on different tasks to enable a single model with multi-task capabilities is gaining increasing attention…

Machine Learning · Computer Science 2024-09-30 Chenyu Huang , Peng Ye , Tao Chen , Tong He , Xiangyu Yue , Wanli Ouyang

Model merging combines knowledge from task-specific models into a unified multi-task model to avoid joint training on all task data. However, current methods face challenges due to representation bias, which can interfere with tasks…

Computer Vision and Pattern Recognition · Computer Science 2024-12-24 Marcin Osial , Daniel Marczak , Bartosz Zieliński

Deep learning has been shown to be very capable at performing many real-world tasks. However, this performance is often dependent on the presence of large and varied datasets. In some settings, like in the medical domain, data is often…

Machine Learning · Computer Science 2025-12-22 Arthur Guijt , Dirk Thierens , Ellen Kerkhof , Jan Wiersma , Tanja Alderliesten , Peter A. N. Bosman

Fine-tuning pre-trained models on targeted datasets enhances task-specific performance but often comes at the expense of generalization. Model merging techniques, which integrate multiple fine-tuned models into a single multi-task model…

Machine Learning · Computer Science 2025-09-11 Zitao Fang , Guodong DU , Shuyang Yu , Yifei Guo , Yiwei Zhang , Yiyao Cao , Jing Li , Ho-Kin Tang , Sim Kuan Goh

Model merging aims to combine multiple task-specific expert models into a single model without joint retraining, offering a practical alternative to multi-task learning when data access or computational budget is limited. Existing methods,…

Machine Learning · Computer Science 2026-05-14 Kaiyang Li , Shaobo Han , Qing Su , Shihao Ji

Model merging combines multiple models into a single model with aggregated capabilities, making it a powerful tool for large language model (LLM) development. However, scaling model merging is challenging: performance depends on the choice…

Machine Learning · Computer Science 2026-02-03 Oliver Bolton , Aakanksha , Arash Ahmadian , Sara Hooker , Marzieh Fadaee , Beyza Ermis

Model merging is an effective strategy to merge multiple models for enhancing model performances, and more efficient than ensemble learning as it will not introduce extra computation into inference. However, limited research explores if the…

Computer Vision and Pattern Recognition · Computer Science 2025-05-19 Hu Wang , Ibrahim Almakky , Congbo Ma , Numan Saeed , Mohammad Yaqub

Lately, the practice of utilizing task-specific fine-tuning has been implemented to improve the performance of large language models (LLM) in subsequent tasks. Through the integration of diverse LLMs, the overall competency of LLMs is…

Computation and Language · Computer Science 2024-12-23 Mingyang Zhang , Jing Liu , Ganggui Ding , Xinyi Yu , Linlin Ou , Bohan Zhuang

Large Language Models (LLMs) require instruction fine-tuning to perform different downstream tasks. However, the instruction fine-tuning phase still demands significant computational resources and labeled data, lacking a paradigm that can…

Computation and Language · Computer Science 2025-03-10 Yiguan Lin , Bin Xu , Yinghao Li , Yang Gao

Reasoning capabilities represent a critical frontier for large language models (LLMs), but developing them requires extensive proprietary datasets and computational resources. One way to efficiently supplement capabilities with is by model…

Artificial Intelligence · Computer Science 2025-06-26 Guinan Su , Jonas Geiping

Model merging is an efficient empowerment technique in the machine learning community that does not require the collection of raw training data and does not require expensive computation. As model merging becomes increasingly prevalent…

Machine Learning · Computer Science 2026-01-01 Enneng Yang , Li Shen , Guibing Guo , Xingwei Wang , Xiaochun Cao , Jie Zhang , Dacheng Tao

Software reuse has long been recognized as a critical and widely studied topic in software engineering, offering substantial benefits in reducing development costs, improving software quality, and enhancing operational efficiency. This…

Software Engineering · Computer Science 2026-02-02 You Lu , Jiyang Zhang , Bihuan Chen , Chaofeng Sha , Dingji Wang , Xin Peng

Model merging aims to combine multiple fine-tuned models into a single set of weights that performs well across all source tasks. While prior work has shown that merging can approximate the performance of individual fine-tuned models for…

Machine Learning · Computer Science 2025-10-17 Mohammadsajad Alipour , Mohammad Mohammadi Amiri

The proliferation of pre-trained models has given rise to a wide array of specialised, fine-tuned models. Model merging aims to merge the distinct capabilities of these specialised models into a unified model, requiring minimal or even no…

Machine Learning · Computer Science 2025-12-23 Yayuan Li , Jian Zhang , Jintao Guo , Zihan Cheng , Lei Qi , Yinghuan Shi , Yang Gao

Recent advances in large language models have led to numerous task-specialized fine-tuned variants, creating a need for efficient model merging techniques that preserve specialized capabilities while avoiding costly retraining. While…

Computation and Language · Computer Science 2025-02-20 Shuqi Liu , Han Wu , Bowei He , Xiongwei Han , Mingxuan Yuan , Linqi Song

Fully finetuning foundation language models (LMs) with billions of parameters is often impractical due to high computational costs, memory requirements, and the risk of overfitting. Although methods like low-rank adapters help address these…

Machine Learning · Computer Science 2026-02-11 Jonathan Svirsky , Yehonathan Refael , Ofir Lindenbaum

The recent success of specialized Large Language Models (LLMs) in domains such as mathematical reasoning and coding has led to growing interest in methods for merging these expert LLMs into a unified Mixture-of-Experts (MoE) model, with the…

Computation and Language · Computer Science 2025-02-18 Yuhang Zhou , Giannis Karamanolakis , Victor Soto , Anna Rumshisky , Mayank Kulkarni , Furong Huang , Wei Ai , Jianhua Lu

Deep model merging represents an emerging research direction that combines multiple fine-tuned models to harness their specialized capabilities across different tasks and domains. Current model merging techniques focus on merging all…

Machine Learning · Computer Science 2025-01-17 Anke Tang , Enneng Yang , Li Shen , Yong Luo , Han Hu , Bo Du , Dacheng Tao

Multi-task learning (MTL) aims to empower a model to tackle multiple tasks simultaneously. A recent development known as task arithmetic has revealed that several models, each fine-tuned for distinct tasks, can be directly merged into a…

Machine Learning · Computer Science 2024-05-29 Enneng Yang , Zhenyi Wang , Li Shen , Shiwei Liu , Guibing Guo , Xingwei Wang , Dacheng Tao

The overarching goals in image-based localization are scale, robustness and speed. In recent years, approaches based on local features and sparse 3D point-cloud models have both dominated the benchmarks and seen successful realworld…

Computer Vision and Pattern Recognition · Computer Science 2019-07-02 Simon Lynen , Bernhard Zeisl , Dror Aiger , Michael Bosse , Joel Hesch , Marc Pollefeys , Roland Siegwart , Torsten Sattler