Multi-level context Modeling for consistent expert selection in Mixture-of-Experts
Mixture-of-Experts (MoE) scales Transformers by routing tokens to a subset of experts, but existing routers use shallow or isolated token representations, leading to unstable and semantically inconsistent routing. This work proposes Multi-level Context Fusion MOE (MCF-MOE), which integrates cross-layer semantic aggregation and local token-level interactions for more context-aware representations. Experiments show improved routing consistency and downstream performance.
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[Submitted on 17 Jul 2026]
Title:Multi-level context Modeling for consistent expert selection in Mixture-of-Experts
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Abstract:Mixture-of-Experts (MoE) enables efficient scaling of Transformer models by routing tokens to a small subset of experts. However, existing routers typically condition expert selection on shallow or isolated token representations, which often produce unstable and semantically inconsistent routing decisions across layers. In this work, we revisit expert selection from a representation perspective and identify context incompleteness as a key bottleneck limiting effective expert specialization. To address this issue, we propose Multi-level Context Fusion MOE (MCF-MOE), a framework that constructs context-aware representations by integrating complementary signals from cross-layer semantic aggregation and local token-level interactions, enabling more informative and consistent expert selection. Experiments on language modeling and understanding benchmarks demonstrate that MCF-MOE consistently improves routing consistency and downstream performance over strong MoE baselines, highlighting the importance of contextual completeness in expert routing. The code is available at this https URL.
Subjects:
Computation and Language (cs.CL)
Cite as: arXiv:2607.16427 [cs.CL]
(or arXiv:2607.16427v1 [cs.CL] for this version)
https://doi.org/10.48550/arXiv.2607.16427
arXiv-issued DOI via DataCite (pending registration)
Submission history
From: Shuhan Huang [view email] [v1] Fri, 17 Jul 2026 18:22:42 UTC (2,669 KB)
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