The videos Hacker News keeps telling people to watch.

Karpathy built HackerTube in two hours and didn't publish how well the filter works or what it cost. This is the open, measured version: every Hacker News comment since 2006, filtered by a cheap typed-decision model, with a small LLM only for the unclear cases. The accuracy, the per-stage cost and the knowledge graph are all published, and the models run in your browser.