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A SemiAnalysis tweet hit X yesterday with two GB300 dev racks CoreWeave scrambled to deploy after their cluster went down. Standard AI infrastructure stuff — until you actually look at the photo.
SemiAnalysis@SemiAnalysis_
Our GB300 cluster went down yesterday, just as Deepseek released 😱
We were 😥 but @CoreWeave came through to contribute to the Open Source.
They scrambled in the compute crisis, finding 2 spare dev racks of GB300
Our team is running Deepseekv4 now for InferenceX benchmarks!
SemiAnalysis @SemiAnalysis_
SAN FRANCISCO, April 24, 2026 — InferenceX has added Day 0 DeepSeek v4 support for @sgl_project’s amazing Blackwell B300 performance, 5x faster than Hopper even on Day 0. Great work to @radixark, @NVIDIAAIDev, and @ying11231 for the first-principles engineering. Huge shoutout to
4:50 PM · Apr 25, 2026 · 41K Views
16 Replies · 25 Reposts · 328 Likes
