Challenge: Mixture-of-Experts (MoE) LLMs achieve higher performance with fewer active parameters, but are still difficult to deploy due to their immense parameter sizes.
Approach: They propose expert-level sparsification techniques to enhance the deployment efficiency of large language models by introducing plug-and-play expert pruning and skipping techniques.
Outcome: The proposed methods reduce model sizes and increase inference speed while maintaining satisfactory performance across a wide range of tasks.

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Diversifying the Expert Knowledge for Task-Agnostic Pruning in Sparse Mixture-of-Experts (2025.findings-acl)

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Challenge: Large Language Models (LLMs) have outstanding performance by learning a large number of model parameters on large amounts of data.
Approach: They propose a method of grouping and pruning similar experts to improve the model’s parameter efficiency by a range of natural language tasks.
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MoE-I2: Compressing Mixture of Experts Models through Inter-Expert Pruning and Intra-Expert Low-Rank Decomposition (2024.findings-emnlp)

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Challenge: emergence of Mixture of Experts (MoE) LLMs has significantly advanced the development of language models.
Approach: They propose a two-stage compression method tailored for Mixture of Experts to reduce the model size and decrease the computational cost.
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A Closer Look into Mixture-of-Experts in Large Language Models (2025.findings-naacl)

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Challenge: Mixture-of-experts (MoE) architectures are gaining increasing attention for their unique properties and remarkable performance.
Approach: They propose a mixture-of-experts architecture that allows for model scaling without sacrificing computational efficiency.
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DIVE into MoE: Diversity-Enhanced Reconstruction of Large Language Models from Dense into Mixture-of-Experts (2025.acl-long)

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Challenge: Existing methods for reconstruction of large language models overlook diversity among experts, leading to potential redundancy.
Approach: They propose a pruning-based expert reconstruction method that prunes a specific LLM and retrains it on routers, experts and normalization modules.
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ModularMoE: Fast LLM Customization with Parameter-Sharing Mixture-of-Experts for Low-Resource Settings (2026.findings-acl)

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Challenge: Large Language Models impose significant computational and storage burdens on personal devices . existing customization approaches incur excessive computational costs or lead to suboptimal performance .
Approach: They propose a training framework that converts pre-trained LLMs into parameter-sharing MoE models for lightweight deployment.
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EAC-MoE: Expert-Selection Aware Compressor for Mixture-of-Experts Large Language Models (2025.acl-long)

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Challenge: Mixture-of-Experts (MoE) has demonstrated promising potential in scaling LLMs . however, it is hindered by two critical challenges: substantial GPU memory consumption and low activated parameters.
Approach: They propose an Expert-Selection Aware Compressor for Mixture-of-Experts (MoE) that aligns with the characteristics of MoE from the perspectives of quantization and pruning.
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Efficient Large Scale Language Modeling with Mixtures of Experts (2022.emnlp-main)

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Challenge: Mixture of Experts layers (MoEs) enable efficient scaling of language models . large autoregressive language models such as GPT-3 can be adapted to a wide range of tasks .
Approach: They propose to use Mixture of Experts layers to enable efficient scaling of language models . they find that MoEs are substantially more compute efficient than dense models compared to MoE models - but only when they are more modestly trained .
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Less, but Better: Efficient Multilingual Expansion for LLMs via Layer-wise Mixture-of-Experts (2025.acl-long)

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Challenge: Existing large language models (LLMs) have remarkable ability in high-resource languages, but their performance in multilingual scenarios is still limited.
Approach: They propose a layer-wise expert allocation algorithm to determine the appropriate number of new experts for each layer.
Outcome: The proposed method outperforms the previous state-of-the-art baseline with 60% fewer experts in the single-expansion setting and 33.3% fewer in the lifelong-expanding setting.
STUN: Structured-Then-Unstructured Pruning for Scalable MoE Pruning (2025.acl-long)

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Challenge: Mixture-of-experts (MoEs) have been adopted for reducing inference costs by sparsely activating experts in large language models (LLMs).
Approach: They propose a structured-then-unstructured approach outperforming both of structured and unstructured pruning for MoEs.
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Efficiently Editing Mixture-of-Experts Models with Compressed Experts (2025.findings-emnlp)

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Challenge: Mixture-of-Experts models allow for efficient scaling of large language models . fewer experts reduce computational costs, while more experts improve performance .
Approach: They propose to activate only a subset of experts during training and inference . they propose compressed experts that preserve the most important experts .
Outcome: The proposed approach preserves the most important experts while replacing other auxiliary activated experts with compressed experts.

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