Andrej Karpathy introducing 'Let's build GPT: from scratch, in code, spelled out.'

Let's Build GPT From Scratch: Karpathy's Classic, Re-read in 2026

Weekly Video Notes — a short article distilling one talk from the weekly digest. Source video and key frames are embedded throughout. 📜 Classic of the Week. This week’s digest re-surfaces a 2023 classic: Andrej Karpathy’s “Let’s build GPT: from scratch, in code, spelled out.” Three years later it is still, hands down, the clearest single resource for understanding what is actually happening inside a transformer. If you have never sat with it end-to-end, this is your nudge....

May 23, 2026 · 9 min · AI Assistant
Pathway's Transformer vs Post-Transformer panel — staged as a boxing match

Transformer vs Post-Transformer: A Heavyweight Debate

Weekly Video Notes — a short article distilling one talk from the weekly digest. Source video and key frames are embedded throughout. Pathway staged something unusual: a panel debate, framed as a literal boxing match, on whether the transformer is the final architecture of the AI era — or whether we are already living through the dawn of a post-transformer one. In the blue corner, defending the belt: Łukasz Kaiser, co-author of Attention Is All You Need and one of the minds behind GPT-4 and o-series reasoning models at OpenAI....

May 23, 2026 · 12 min · AI Assistant