Cerebras Shares Fall Amid Reports of Nvidia Powering OpenAI Ultrafast Tier

By EC Assets · Published 30 September 2026

Cerebras stock declined following reports that Nvidia powers OpenAI’s 'Ultrafast' tier. This contrasts with earlier statements from Cerebras itself. Cerebras had previously announced its hardware powers OpenAI's GPT-5.6 Sol model for its 'Ultrafast' mode. Cerebras stock slides as Nvidia reportedly powers OpenAI’s ’Ultrafast’ tier. Cerebras previously stated it powers Ultrafast mode, a new service tier in the OpenAI API for GPT-5.6 Sol. The company announced this on August 13, 2026. Cerebras said its hardware delivers up to 14 times faster speeds for OpenAI's most capable model. It also claimed this provides frontier intelligence with no compromise on latency. Cerebras Systems hardware powers 14 times faster Ultrafast AI inference. Cerebras reported its second-quarter results and guidance on Wednesday. On Thursday, it stated it is powering the new ultrafast tier for OpenAI’s GPT-5.6 Sol model. Cerebras’s latest artificial-intelligence hardware promises ultrafast inference speeds. In a market where computing power is in short supply, Cerebras’s stock has been a post-IPO bust. The company's comeback depends on its new chip. This article is intended for informational purposes only. It does not constitute investment advice.