Karpathy builds HackerTube in 2 hours with Claude, filtering 43M HN comments into 6,454 videos
karpathy · x · 2026-11-02
Andrej Karpathy shipped a weekend hack called HackerTube: annoyed by YouTube's recommendations, he had Claude (Opus 5.5 via Claude Code, 2 hours, mostly hands-off) analyze 43M comments across 20 years of Hacker News and surface the 6,454 videos HN keeps recommending.
Highlights:
- Great recommendations with no logins; state lives in the local browser session
- Thumbnails are representative mid-video frames instead of hyper-optimized clickbait covers
- The underlying comment-analysis dataset ships as a zip so anyone can point Claude at it and build their own version
Screenshots show a deeply nerdy catalog (Ben Eater, Gil Tene, Freya Holmér); early testers say the top recommendation was exactly what they wanted to watch.
Related event: Karpathy builds HackerTube in two hours with zero handwritten code(12 posts)→
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