Cerebras Shares Rise After Sam Altman Reaffirms OpenAI Partnership and Commitment

Cerebras structured its post-IPO lockup as 11 separate share releases rather than a single 180-day freeze; the September 30 release made about 19.4 million shares eligible for sale, following three earlier releases of 14.6 million shares each.
Cerebras makes wafer-scale AI systems and software that links them into supercomputers; the company says its systems support both model training and inference and work with frameworks such as PyTorch.
Cerebras sold its shares at $185 in its May IPO, above the indicated $150-to-$160 range, and the stock opened at $350 on May 14 before later falling.
Cerebras shares jumped in premarket trading and during Monday's session after OpenAI CEO Sam Altman called the companies Benzinga "close partners" with deep work underway to improve AI speed. His comments eased concerns sparked by reports that OpenAI's new GPT-6.1 Sol Ultrafast model would initially use Nvidia hardware rather than Cerebras chips.
Under their multiyear agreement, OpenAI plans to deploy up to 750 megawatts of Cerebras inference capacity through 2028, initially valued at over $10 billion Yahoo Finance. The reassurance came at a critical time, as Cerebras shares have faced pressure from weak earnings, hardware reports, and newly eligible insider shares following the company's May IPO at $185 per share.
Cerebras stock rose 6.3% in premarket trading to $177 per share Newsy Today after Altman's social media post reaffirmed OpenAI's commitment. The stock had suffered a 20% drop following reports that OpenAI's fastest new model would debut on Nvidia chips instead of Cerebras hardware. Altman's comments stating the companies have "deep engagement pushing on the frontiers of speed" Yahoo Finance Singapore directly addressed investor fears about the partnership's strength.
OpenAI and Cerebras signed a multiyear agreement that commits the AI lab to deploy up to 750 megawatts of Cerebras inference capacity in phases through 2028. The initial value of this deal exceeds $10 billion. Inference means running already-trained AI models to generate responses. This long-term commitment signals confidence that Cerebras' wafer-scale systems will become core to OpenAI's infrastructure over time.
Cerebras has struggled since its May IPO at $185 per share, when the stock opened at $350 before falling. The company has faced multiple headwinds: weak earnings and guidance, reports that OpenAI would use Nvidia for its newest model, and a lockup structure that released insider shares in phases. On September 30, about 19.4 million additional shares became eligible for sale Benzinga, following three earlier releases of 14.6 million shares each, putting downward pressure on the stock price.
Cerebras manufactures wafer-scale AI systems and software that links them into supercomputers. The company says its hardware supports both model training — the process of teaching an AI — and inference, or running that model. Cerebras systems work with standard AI frameworks like PyTorch, making them compatible with how most AI labs build models. OpenAI's decision to deploy hundreds of megawatts of Cerebras capacity suggests the chipmaker's approach will handle the massive compute demands of running large AI models at scale.
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