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The Router Already Knows

Bistras, Andrew et al.
arXiv (All) · Papers
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artificial-intelligencecomputation-and-languagemachine-learning
Mixture-of-experts (MoE) models already make a sparse choice for every token: which experts should process it. We ask whether a sparse dictionary should reuse that choice. NR-SAE gives each routed expert a small dictionary and opens only those the frozen router selects. At block 15 of Gemma 4 26B-A4
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