// the find
lilianweng/lilianweng.github.io
My personal page
Lilian Weng's personal blog, hosted as a static site on GitHub Pages. She's a researcher at OpenAI, and the posts are long-form technical deep-dives on ML topics — attention mechanisms, RL, diffusion models, LLM reasoning — written with actual mathematical rigor rather than surface-level summaries. This is reference material, not tutorials.
The posts are genuinely thorough: the attention/transformer post from 2018 remains one of the clearest derivations of the math online. Coverage spans a decade of ML history with consistent depth, so you can trace how ideas evolved. Diagrams are hand-chosen and actually explain the concepts rather than decorating them. Still actively updated as of mid-2026, which is rare for a personal blog of this age.
It's a static HTML site built from a Hugo generator — there's no source Markdown in this repo, just the rendered output, so you can't contribute corrections or submit PRs against the actual content. The repo structure has image duplication artifacts (assets appearing under nested paths like posts/2018-02-19-rl-overview/posts/2018-02-19-rl-overview/) suggesting a messy generator config nobody's cleaned up. Search is client-side JS and works poorly on mobile. Not a library or tool — starring this gets you nothing you couldn't get by bookmarking the website.