There are signs across AI models, chips, and new form factors that the market is getting frothy. Investors spent the summer wondering if top AI stocks could continue to justify soaring valuations in the face of absent returns from their massive AI spending. Now, signs have emerged that they're not yet done with generative AI mania. OpenAI reaches dizzying new heightsSam Altman's OpenAI secured a $157 billion valuation after raising $6.6 billion in its latest funding round. In short, a lossmaking startup must justify its $157 billion valuation.

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Persons: Cerebras, —, Andrew Feldman, Ramsey Cardy Cerebras, here's, Abu, Cerebras —, Altman's OpenAI, OpenAI, Elon Musk's xAI, OpenAI's, Ilya Sutskever, Gary Marcus, OpenAI's Sam Altman, David Sacks, Darius Rafieyan, Mira Murati, Mark Zuckerberg, Andrej Sokolow, frothiness, Jensen Huang, Alex Heath, Rahul Prasad, Snapchat Organizations: Nvidia, Service, Investors, Microsoft, Saudi Aramco, Bloomberg, OpenAI, LLMs, Financial Times, Anthropic, Craft Ventures, Tiger Global, The New York Times, Getty, company's Connect, Meta, Orion Locations: Sunnyvale, Abu Dhabi, Silver, Saudi, Silicon Valley, —