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Paste a LessWrong URL to find semantically similar content

About the corpus

Last updated 2026-04-19 · 372,559 docs

LessWrong — 36,220 posts, 6,329 top level shortforms, 289,721 comments. Scraped from posts with karma ≥ 5.

Substack — 40,289 posts across 173 publications, scraped from a curated list of potentially relevant blogs.

Each doc is split into ~360-token chunks (heading-aware, sliding window, or whole-doc for short pieces), embedded with Voyage-3.5, then averaged into a single doc vector. Similarity is cosine distance; top 100 matches per query.

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