Andrej Karpathy built a curated video platform in a weekend using Claude and 20 years of Hacker News

Andrej Karpathy built HackerTube over a weekend using Claude's Opus 5.5 model, which filtered 43 million comments from 20 years of Hacker News into 6,454 videos that keep getting recommended there. He says the site offers a "significantly better viewing experience" than YouTube's recommendations, needs no login, shows a single mid-video frame instead of optimized thumbnails, and stores state locally in the browser. He then built TristanTube, "one-shotted with Claude Code in 3 minutes," with 47,000 videos from a YouTube channel list by Tristan Hume.