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October 21, 2025@elonmusk →
@karpathy Long-term, >99% of input and output for AI models will be photons. Nothing else scales. https://t.co/YMOpxp2xtI https://grok.com/share/bGVnYWN5_fb9c675b-c6b7-4ed0-a4de-bc07cb23a1d8
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