Rewiring Gemma E4B Layers: Attention Sink Behavior Makes Model Surgery Hard
teortaxesTex · x · 2026-11-06
Quoting @YichengXiaAI's experiment: rewiring selected layers of Gemma E4B caused no unusual behavior thanks to careful layer choice, but large gains on downstream tasks are unlikely. The key obstacle is the KV "attention sink" at layer i, which piles excessive attention weight on certain layers, making full model surgery difficult.
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