Karpathy's HackerTube: 6,454 curated videos from 43 million comments

Karpathy's weekend project is notable less for the site itself than for what it says about the division of labor between a person and an AI coding agent. He describes letting Claude Code handle nearly all the work, from data analysis to server setup, with his own contribution limited to a Google Cloud API key, a rented server, and buying the domain. That is a striking claim about how much of a full build can now be delegated.

The scale of the filtering is the other half of the story. Twenty years of Hacker News produced 43 million comments, and Claude's Opus 5.5 distilled them into 6,454 videos that keep getting recommended there — a curation job that would have been impractical to do by hand. Karpathy's verdict, posted on X, is that the resulting viewing experience is "significantly better" than YouTube's own recommendations.

He immediately repeated the exercise with TristanTube, which he says was one-shotted with Claude Code in 3 minutes and drew 47,000 videos from a YouTube channel list by Tristan Hume. Taken together, the two builds suggest that projects which used to take weeks can now be done in a few hours, at least in Karpathy's telling.