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.
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The author breaks down how Karpathy used a single prompt to build a video site in 3 minutes, and points out that the hard part has shifted from writing code to filtering content worth watching.
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View original postEarlier this week Tristan published his top YouTube channels: https://t.co/NZ3UCNo6cT Which looked excellent so clearly I had to turn it into TristanTube: https://t.co/l0KyW1WdNH 47K super nerdy videos +TV mode for laid back watching. (One-shotted with Claude Code in 3 minutes)
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Earlier this week Tristan published his top YouTube channels: https://t.co/NZ3UCNo6cT Which looked excellent so clearly I had to turn it into TristanTube: https://t.co/l0KyW1WdNH 47K super nerdy videos +TV mode for laid back watching. (One-shotted with Claude Code in 3 minutes)
Body · AI translation
Holy crap, is this the value of the world's most powerful AI brain right now? Karpathy, the god of cards, used a one-sentence prompt and in 3 minutes built a TV station dedicated to hardcore videos, containing about 47,000 engineering, science, crafts, and mechanical videos, plus a full-screen TV mode for lying down and scrolling. The origin is simple: Tristan Hume, Anthropic's performance optimization lead, updated a 2026 YouTube channel tier list, ranking channels by S, A, B, C, D, with only one criterion: whether you can learn something real, and whether it's worth watching repeatedly. Karpathy threw the list link to Claude Code and told it to build a YouTube-style playback site based on it, plus an about page, dark mode, and TV mode. Just that one sentence, and the finished product is called TristanTube.
This speed difference is so damn astonishing. A week ago he made a similar site, HackerTube, filtering out repeatedly recommended videos from twenty years of Hacker News comments, and that time took about 2 hours. This time it only took 3 minutes. The difference lies in the hardest step: picking out which videos are worth watching. Tristan had already done that for him, so all the AI had left to do was build the interface.
There's an easily overlooked shift here: writing code is becoming a matter of minutes, while judging what is worth watching, worth reading, and worth doing has instead become the scarcest part.
Tristan's list is taste that a person developed by looking at things one by one; what Karpathy did was turn that taste into a usable product.
The site itself is also very easy to use: you can filter by tier, filter by duration—under ten minutes or over half an hour—shuffle with one click, or have it randomly recommend one. TV mode supports keyboard controls: N for next, P for previous, space to pause, suitable for lying down and watching at night.
For ordinary people, the most directly copyable thing is this idea: The reading lists, podcasts, tools, or papers you've accumulated in your bookmarks for years are, from another angle, a ready-made list. Throw it to Claude Code, and in a few minutes it can become a small website you can open and share.
The site, the original list, and the original text of that prompt are in the first post. https://t.co/kaUBgcqVD2