Andrej Karpathy built a curated video platform in a weekend using Claude and 20 years of Hacker News

Matthias Bastian View the LinkedIn Profile of Matthias Bastian Nov 8, 2026 Andrej Karpathy, OpenAI co-founder and current Anthropic AI researcher, built HackerTube over a weekend using Claude’s Opus 5.5 model. Claude filtered 43 million comments from 20 years of Hacker News and distilled them into 6,454 videos that keep getting recommended there. The result is a “significantly better viewing experience” than YouTube’s own recommendations, Karpathy writes on X. The site needs no login, shows a single mid-video frame instead of optimized thumbnails, and stores state locally in the browser. Right after, Karpathy built TristanTube, “one-shotted with Claude Code in 3…