Open Source AI Disrupts Valuations; Expert Calls NVIDIA's 75% Margin Unsustainable

wightmanr · x · 2026-07-21

Ross Wightman points out that open weights and open source AI are far from 'decelerationist' at a human scale. For the broader US AI ecosystem, open source introduces necessary competition, challenging the assumption that a handful of frontier labs will reap most of the benefits, and bringing the sanity of current valuations and compensation into question. He highlights that recent developments prove companies with less capital, lower salaries, and lower burn rates can effectively compete. Pushing this argument down the stack into hardware, Wightman argues that to stay competitive, the US must address NVIDIA's 75% gross margin. While crediting NVIDIA's success, he notes that such a 'tax' on all frontier model labs is unsustainable for the collective West in the long run.

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