Interpretability debate: SAEs remain best for mapping representation space

thebasepoint · x · 2026-10-27

A discussion on interpretability trade-offs: the author agrees that residual-stream SAEs and related methods are still a very good way to map a model's representation space. However, for safety-relevant readouts of a model's "thoughts", metamodel outputs are more precise and easier to consume. For causes that aren't verbalizable — potentially lacking any human word — SAEs remain the right tool. Key takeaway: SAEs and metamodels serve different goals rather than replacing each other.

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