Karpathy says Opus 5.5 mined Hacker News comments from 2007-2026 to build a 6,454-video YouTube alternative in about two hours on October 31st.
By [RuntimeWire Staff](https://runtimewire.com/author/runtimewire-staff)
· Published
· Updated
Primary source: [Hacker News](https://karpathy.bearblog.dev/hacker-tube/)
Why it matters #
HackerTube shows a senior AI researcher using an agentic model to replace a mass-market recommendation feed with a personal one built from a trusted public corpus. His account also gives Anthropic a demonstration of Opus 5.5 handling data processing, product building, and deployment in one workflow.
Andrej Karpathy opened YouTube late on Friday night, disliked what the recommendation system served him, and spent Saturday morning building an alternative. In his October 31st post on his Bear Blog, Karpathy called the homepage an "enshittified wall of slop" and wrote that the algorithm may work for the median internet user, but "it definitely does not work for me."…
When you purchase through links in our articles, we may earn a small commission. This doesn’t affect our editorial independence.