Cerebras Stock Slides as Nvidia Reportedly Powers OpenAI's Ultrafast Tier

Cerebras' stock price plummeted by 7% following industry speculation that Nvidia's technology powered OpenAI's 'Ultrafast' tier, GPT-6.1 Sol Ultrafast.

The sell-off was triggered when semiconductor research firm SemiAnalysis reported on X (formerly Twitter) that OpenAI's newest flagship model is running on traditional GPUs at a low batch size, rather than on Cerebras chips.

This revelation raised questions among analysts about whether Cerebras will secure a role in serving the highly anticipated GPT-6.1 Sol Ultrafast model in the future, dealing a blow to near-term investor confidence.

The 'Ultrafast' tier promises token generation speeds up to eight times faster than standard deployments, reaching an estimated 300 tokens per second, which requires massive memory bandwidth to process requests instantly as they arrive, a computational challenge that Cerebras' hardware was expressly designed to solve.