LearnGPT was demoed by Karpathy in his 'Let's build GPT' tutorial
mhmazur · x · 2026-10-19
Matt Mazur shares the backstory: LearnGPT was demoed at the 1-minute mark of Karpathy's classic tutorial "Let's build GPT: from scratch, in code, spelled out." That's why the site's archive of original ChatGPT responses is now being used for a side-by-side comparison against GPT-6 Astra's answers to the same 492 prompts.
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