Interactive Explainer Breaks Down Looped Transformers: What Another Pass Through the Same Layers Buys
cto_junior · x · 2026-09-09
A 9-stage interactive explainer (5 min) titled "GPT-6 Research Explorer: How Looped Transformers Work" unpacks the idea of running the same layers multiple times. Using a reachability-propagation toy machine, it shows why a second pass isn't a no-op: each pass reads the state (marks) left by the previous one, taking a snapshot before writing additions so check order doesn't change the work done. Readers solve puzzles, rewire loops, and try new cases to learn what looping actually buys for hard questions.
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