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A Survey on Model MoErging: Recycling and Routing Among Specialized Experts for Collaborative Learning

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arxiv 2408.07057 v2 pith:7SKFEFY3 submitted 2024-08-13 cs.LG cs.AIcs.CL

classification cs.LGcs.AIcs.CL
keywords moergingmethodsmodelmodelsexpertsurveyapplicationsdesign
verification ladder T0 review T1 audit T2 compute T3 formal
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The availability of performant pre-trained models has led to a proliferation of fine-tuned expert models that are specialized to a particular domain or task. Model MoErging methods aim to recycle expert models to create an aggregate system with improved performance or generalization. A key component of MoErging methods is the creation of a router that decides which expert model(s) to use for a particular input or application. The promise, effectiveness, and large design space of MoErging has spurred the development of many new methods over the past few years. This rapid pace of development has made it challenging to compare different MoErging methods, which are rarely compared to one another and are often validated in different experimental setups. To remedy such gaps, we present a comprehensive survey of MoErging methods that includes a novel taxonomy for cataloging key design choices and clarifying suitable applications for each method. Apart from surveying MoErging research, we inventory software tools and applications that make use of MoErging. We additionally discuss related fields of study such as model merging, multitask learning, and mixture-of-experts models. Taken as a whole, our survey provides a unified overview of existing MoErging methods and creates a solid foundation for future work in this burgeoning field.

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Cited by 4 Pith papers

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  3. When One LLM Drools, Multi-LLM Collaboration Rules

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    A position paper that introduces a four-level taxonomy of multi-LLM collaboration (API, text, logit, weight) and argues it is essential for reliability, pluralism, and democratization.

  4. Exploring Sparse Adapters for Scalable Merging of Parameter Efficient Experts

    cs.LG 2025-07 conditional novelty 5.0 of 10

    Sparse adapters trained with max connection sensitivity outperform LoRA and full fine-tuning both alone and after merging 20 task experts, but still lag multitask training on unseen tasks.

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