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Key customer OpenAI moving inference to Nvidia undermines Cerebras' revenue engine; insider selling and IPO-day valuation erosion amplify downside. Comparable episodes show stock sensitivity to AI infra shifts and major customer concentration risk (e.g., early post-IPO outsized moves when a single customer dominates revenue).
What happened, with direct paths to the underlying reporting
Cerebras stock tumbled after reports OpenAI will run GPT-6.1 Sol on Nvidia GPUs rather than Cerebras hardware. The shift toward Nvidia weakens Cerebras' AI inference advantage, despite a >$10B OpenAI deal through 2028. Insider unlocks and selling add near-term pressure.
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