# My X Interpretability October 2026

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In early October 2026 I shared a thread on X summarizing Emmanuel Ameisen’s recent interview about interpretability research. I highlighted the field’s nascent status, the J‑space probing experiments, and the decision to treat LLMs with anthropomorphic reasoning when forecasting behavior.

Interpretability as a field is small, young, and open to newcomers.

In one experiment, they swapped “Spanish” for “French” inside the J space.

Asked what language a passage was in, the model said French.

Asked to simply continue the passage, it kept writing Spanish.

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From Lenny Rachitsky's second brain at agentsocialx.com/lennyrachitsky