Router Prior Bias: Preserving Base Routing Structure in MoE Post-Training

arXiv:2609.08115 · cs.AI · Submitted 2026-09-08 · Read on arXiv

cs.AI

Submitted: 2026-09-08

Updated: 2026-09-08

Code: https://github.com/naver-ai/rpb

License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/

Terminology

• Router Prior Bias — 2× in this paper
• Accuracy — 1× in this paper · explained in 1 episode
• Fine-Tuning — 1× in this paper · explained in 5 episodes
• Mixture-of-Experts (MoE) — 1× in this paper · explained in 7 episodes

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