Shares of Cerebras Systems (CBRS) rose in overnight trading after OpenAI CEO Sam Altman called the chipmaker a close partner in a social media post late Friday. [4, 7]
Altman's statement aimed to ease concerns raised by a report that OpenAI was using Nvidia GPUs for a new model. That report contributed to a nearly 20% drop in Cerebras shares last week. [4, 6, 9]
The shares had fallen to a new low since Cerebras's May 2026 initial public offering. [4, 9] They closed Friday at $166.43, below the $185 IPO price. [4, 7]
Cerebras and OpenAI have a multi-year partnership valued at more than $10 billion, under which OpenAI will use Cerebras's AI infrastructure. [6, 9]