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Free guide · Claude & Claude Code

How Karpathy built HackerTube, step by step

How one of OpenAI's founders got Claude to turn 43M comments into his own YouTube in about 2 hours, what he did by hand, and how to build your own from his free data.

Charlie Hills Added 3 November 2026 · Free

What’s inside

  1. 11. What he built
  2. 22. The one line he gave Claude
  3. 33. The five steps Claude ran
  4. 44. Who did what
  5. 55. Build your own from his data
  6. 66. Use his method on your own data
  7. 77. When something does not work

1. What he built

HackerTube is a YouTube with no algorithm. Every video on it is one that people on Hacker News, a tech forum, kept telling each other to watch.

What

Number

Source

Comments Claude went through

43M

His X post

Years covered

2007 to 2026

About page

Comments that made it in, each labelled

39,834

About page

Videos on the site

6,454

About page

Topics

150, in 16 areas

About page

Time

About 2 hours

His blog and X post

He also swapped the uploaded thumbnail for a frame from the middle of the video, so there is no clickbait. There are no accounts. Your likes and history stay in your browser.

That’s the first part. The rest of this guide is free too.

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