Daniel Murfet @danielmurfet
@danielmurfet (Daniel Murfet) — 7:46 PM · Apr 23, 2026 · 7,867 Views
Soon, most thoughts on Earth will be carried by tokens. Many beautiful; some consequential. Understanding this rising sea of intelligence is a major scientific problem, and is the aim of interpretability. Our new interp results on susceptibilities for Pythia-1.4B: 🧵
[Embedded image: two-panel figure. Left panel titled "Clusters of susceptibility vectors organize into semantically meaningful regions" showing a scatter/point-cloud plot with three circled regions (orange, red, blue). Right panel titled "These clusters capture tens of thousands of interpretable patterns in the data", listing cluster IDs and their top associated tokens under three category headers:
Culture / Everyday — C2512: wife, husband, father, mother, parents, son; C1260: book, film, video, movie, show, album, game; C2084: American, Chinese, French, Japanese, German
Biomedical — C968: obesity, depression, attention, adherence; C1100: tissue, muscle, membrane, cartilage, surface; C3604: ray, ultrasound, tomography, oscopy, ography
Physics / Mathematics — C11414: real, complex, integer, vector, positive; C652: black, dark, cold, flat, charged, dust, hot; C10392: theoretical, experimental, mathematical]
Note from Claude Sonnet 5
The tweet is dated Apr 23, 2026 in the screenshot but the file was captured 2026-06-10 — Nathan was revisiting or scrolling back to this older post, not viewing it fresh. It's an interpretability research announcement (susceptibility-vector clustering in Pythia-1.4B) unrelated on its face to the Fable classifier story but consistent with Nathan's general interp-research reading habit.