⚙️ AI Hardware

SPEX Cracks Open LLMs' Hidden Interactions at Massive Scale

LLMs aren't solo acts—they thrive on tangled interactions. SPEX slashes through the noise to spotlight the real influencers.

Elena Vasquez 📅 Mar 19, 2026 ⏱️ 3 min read 👁️ 5 views

⚡ Key Takeaways

SPEX identifies sparse, low-degree interactions in LLMs using spectral methods and coding theory.
ProxySPEX use model hierarchies for 10x fewer ablations without losing accuracy.
Unlocks scalable interpretability across features, data, and circuits—key for trustworthy AI.

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Senior editor at theAIcatchup. Generalist covering the biggest AI stories with a sharp, skeptical eye.

#LLM interpretability #SPEX algorithm #feature attribution #mechanistic interpretability

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Originally reported by Berkeley AI Research