Karpathy used a single prompt to make Claude Code build the TristanTube video site in three minutes

Karpathy gave Claude Code the link to Tristan Hume's YouTube channel tier list, and with a single prompt built TristanTube in 3 minutes—a playback site with about 47,000 engineering, science, crafts, and mechanical videos, complete with an About page, dark mode, and full-screen TV mode. The author notes that a week earlier, building a similar HackerTube took him about 2 hours; the difference is that this time, the filtering of videos worth watching had already been done by Tristan, so the AI only needed to build the interface. The author thus suggests that writing code is becoming a matter of minutes, while judging what is worth watching, reading, and doing is becoming scarcer—and recommends throwing years of collected book lists, podcasts, or paper lists at Claude Code to turn them into a shareable mini-site.