Jacobian Lens explained: a lie detector that reads what an LLM really believes
huopak · reddit · 2026-10-27
An explainer video walks through Jacobian Lens, an interpretability technique that probes a model's internal representations to reveal what it 'actually believes' independent of its stated output — demonstrated as a lie detector for LLMs that distinguishes the model saying 'you're right' from internal signals indicating otherwise. A good entry point into mechanistic interpretability.
Related event: Jacobian Lens: A Lie Detector for LLMs Explained(2 posts)→
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