White-box monitoring won't match CoT monitorability within a year, researcher says

Jack_W_Lindsey · x · 2026-09-02

Responding to a prediction that mechanistic interpretability monitors will be Pareto-optimal to CoT monitors within a year, Jack Lindsey is skeptical: white-box techniques catch some unverbalized thoughts but remain far less reliable than CoT. He's optimistic on a few-year horizon — both go-to activation decoding techniques for production monitoring were published in recent months — but notes techniques may not be widely deployed if costly. He argues for defense in depth: stress-test white-box methods without letting CoT monitorability degrade.

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White-box monitoring won't match CoT monitorability within a year, researcher says

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