Andrej Karpathy built a curated video platform in a weekend using Claude and 20 years of Hacker News
Andrej Karpathy, OpenAI co-founder and current Anthropic AI researcher, built HackerTube over a weekend using Claude's Opus 5.5 model. Claude filtered 43 million comments from 20 years of Hacker News and distilled them into 6,454 videos that keep getting recommended there . The result is a "significantly better viewing experience" than YouTube's own recommendations, Karpathy writes on X . The site needs no login, shows a single mid-video frame instead of optimized thumbnails, and stores state locally in the browser. Right after, Karpathy built TristanTube , "one-shotted with Claude Code in 3 minutes," with 47,000 videos drawn from a YouTube channel list by Tristan Hume.
Karpathy says he let Claude Code handle nearly all the work, from data analysis to server setup. His only manual steps were a Google Cloud API key, a rented server, and buying the domain. Projects that used to take weeks can now be done in a few hours, Karpathy says.
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