Nick Cammarata's interpretability essay goes viral, sparks features-vs-mechanisms debate

inductionheads · x · 2026-10-17

Nick Cammarata says his informal research essay on neurons unexpectedly went viral, triggering unusually rich mechanistic interpretability discussions: whether to think in features or mechanisms, how much weak activations matter, and how scale changes things. He clarified the piece was an "informal essay and working hypothesis" with citations only for the basic story, the rest living in their still-unfinished technical paper; he has now added citations and thanked collaborator @curttigges for the language neuron research.

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