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brianletort.aiD. Brian Letort, Ph.D.

AI Market · Forecast desk · miss · networking

70% · miss

At least one major hyperscaler other than Microsoft publicly discloses a production AI fabric running MRC at greater than 50,000-GPU scale.

Back to the bookIssue 2026-W19Evidence ↗

Outcome

misscalled at 70%resolved September 1, 2026brier contribution 0.490other

Public MRC production deployments at >50k-GPU scale are attributed to Microsoft/OpenAI sites (Fairwater, Abilene); no Google, Amazon, or Meta hyperscaler other than Microsoft disclosed a production AI fabric running MRC above the 50,000-GPU threshold by Aug 31.

Evidence: https://openai.com/index/mrc-supercomputer-networking/