Percy Liang's CS336 slide: open models are what make teaching LLMs from scratch possible

stanfordnlp · x · 2026-09-09

A viral post explains why the open ecosystem is underrated, citing a slide from Stanford's CS336 (Language Models from Scratch) taught by Percy Liang: GPT-4 cost $100M to train, the next generation $1B, and its paper explicitly refuses to share how anything works — so frontier models are out of reach for academia both financially and epistemically. Llama, DeepSeek, Qwen, Kimi, GLM, Minimax, MIMO, AI2, NVIDIA and the Marin project publish weights, code and data instead. The slide's key line: "Ideas from open models enable us to teach CS336." The post responds to Nathan Lambert's argument that new open models deserve more attention than frontier lab drama.

Related event: Percy Liang: Open Weights Alone Don't Make Open AI(2 posts)→

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