Path-Lock Expert uses two mode-specific MLP experts per decoder layer with a deterministic router to cleanly separate think and no-think modes, improving no-think accuracy and conciseness on math benchmarks while keeping think performance intact.
Differentiate (20) with respect toβ: ∇βLdense(β) = (π 0H0 +π 1H1)β−(π 0H0β⋆ 0 +π 1H1β⋆ 1)
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Path-Lock Expert: Separating Reasoning Mode in Hybrid Thinking via Architecture-Level Separation
Path-Lock Expert uses two mode-specific MLP experts per decoder layer with a deterministic router to cleanly separate think and no-think modes, improving no-think accuracy and conciseness on math benchmarks while keeping think performance intact.