Karpathy's 2-Hour Masterclass, and the First Comment Is Already Taking It Apart
A tweet said Karpathy had released a 2-hour masterclass discussing Agents, Harnesses, Loops, and Graphs. Someone in the comments dug up the original video: it was How I use LLMs, published in February 2025, and over two hours long, it did not discuss a single Agent.
A tweet said that Andrej Karpathy had released a two-hour masterclass covering four topics—Agents, Harnesses, Loops, and Graphs—and ended with 'must-watch, bookmark this.'
The first reply in the comments came from Pierre Martinow: the content is already over a year old, and the original video is here. He posted a YouTube link, with a publish date of February 27, 2025, and the title How I use LLMs.
The video mentioned in the tweet:
The original uploaded by Karpathy himself:
The runtime is 2 hours 11 minutes, with 2.84 million views and nearly 70,000 likes. The chapter list is as follows: How ChatGPT interaction works, basic interaction examples, models and pricing tiers, when to use thinking models, web search, deep research, file uploads, Python interpreter, ChatGPT advanced data analysis, Claude Artifacts, coding with Cursor, voice input/output, advanced voice mode, NotebookLM podcast generation, image input and OCR, image output, video input/output, ChatGPT memory and custom instructions, custom GPTs.
This is a tool-use tutorial. It teaches you how to upload files in ChatGPT, how to use Cursor's Composer, and how to get NotebookLM to generate podcasts. The terms Agents, Harnesses, Loops, and Graphs do not appear anywhere in the chapter list.
Richard Kulling made this point explicit in a reply: correction, the video is over a year old and does not cover Agents, Harnesses, Loops, or Graphs at all.
Siddharth put it more bluntly: this is Bronze Age stuff; the world has moved on.
Another reply came from Code Furioso and raised a different issue: commenting 'bookmark this' on a two-hour video just turns my bookmarks into a graveyard full of things to 'watch this weekend.' Has anyone actually finished it? Which part is worth the two hours?
ibanami added: bookmark a two-hour video, then never open that tab again.
James Malsawm was positive, though: two hours of Karpathy beats a month of tutorials.
The tweet's spread was not complicated. A practical tutorial from a year ago was repackaged as a 'masterclass,' paired with four of the hottest terms of the moment, and given a 'must-watch' line. The video itself did not change; the promise in the title did. In the comments, some people checked the original link, some calculated the runtime, and some pointed out that the chapter list did not match the promotional language.
For people who have seen the original video, it still has value. For people who clicked in because of 'Agents, Harnesses, Loops, Graphs,' the problem becomes apparent within the first ten minutes. The two-hour threshold itself also filters people; bookmarking is far cheaper than watching. The bookmark graveyard Code Furioso mentioned is probably the most common fate for this kind of content.
发布时间: 2026-10-30 23:42