# Karpathy builds HackerTube, a YouTube-style site of videos recommended on Hacker News

> Original title: HackerTube

- Source: Andrej Karpathy
- Published: 2026-10-31T17:00:00.000Z
- Bad Influence: https://badinfluence.news/items/u2hvn9xriabnf0qgzbgdijher
- Original: https://karpathy.bearblog.dev/hacker-tube/

## Summary

Andrej Karpathy says Claude Opus 5.5 built HackerTube, a YouTube-style site with 6,454 videos recommended in Hacker News comments from 2007 to 2026. Opus downloaded the comments and used Sonnet to filter out spam and low-quality posts, narrowing them to 40K comments recommending a video. The site offers personalized recommendations without user accounts, keyboard shortcuts, and a data export for building similar versions.