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GPT-6 Astra Ultrafast runs on Nvidia, not Cerebras

The author says an Nvidia blog post solved the mystery of Ultrafast's inference speed: it runs on Nvidia chips, not Cerebras as previously guessed.

Nick Dorsey
@Midnight_CaptlArchived 2026.10.03Originally posted 2026.10.02
Nick Dorsey @Midnight_CaptlOriginally posted 2026.10.02
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Ah… Mystery solved GPT-6 Astra ultrafast runs on NVIDIA, not Cerebras Interesting

This post quotes another post: “Nvidia says GPT-6 Astra Ultrafast runs on its chips with up to 8x speedup”

x.com/midnight_captl/status/2105815859193356524Archived 2026.10.03 10:05