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Cerebras gains after Altman says co is a "close partner"

By Reuters News22:48 (UTC), 2 October 2026 Updated

** Shares of chip designer Cerebras Systems CBRS.O up 2.8% at $171.08 in extended trading

** OpenAI CEO Sam Altman says Cerebras is a "close partner" and that the companies have "deep engagement pushing on the frontiers of speed"

** Comment comes after speculation that Cerebras chips were used to serve OpenAI's GPT6.1 Sol Ultrafast model

** CBRS shares have fallen 10% from their IPO price of $185 in May

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