China AI models may use restricted Nvidia Blackwell chips, ex-OpenAI researcher claims

A former OpenAI researcher alleges that several major Chinese AI models may have been trained using Nvidia's Blackwell superchip, which is subject to US export restrictions. The claim is unverified and coincides with Nvidia CEO Jensen Huang's departure amid a scandal involving infidelity and espionage allegations. If true, it would indicate sanctions evasion and have significant implications for US export controls and the AI race.

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