Cerebras stock climbs 6% after Sam Altman calls chipmaker a 'close partner'

Cerebras shares rose 6.3% in premarket trading to $177 after OpenAI CEO Sam Altman called the company a "close partner." The rebound follows a 20% drop last week when OpenAI said it would power GPT-6.1 Sol's Ultrafast mode with Nvidia GPUs instead of Cerebras chips.

• Cerebras stock rose 6.3% to $177 in premarket trading Monday
• Shares fell 20% last week after OpenAI chose Nvidia GPUs over Cerebras
• Market cap dropped from $95 billion at May IPO to just over $39 billion
• Cerebras signed a $10 billion deal with OpenAI in January through 2028