Anthropic's valuation rose to $350 billion, sharply higher than $183 billion valuation in September, reported CNBC-TV. This comes after Microsoft and Nvidia invested $5 billion and $10 billion, respectively, into Anthropic. Microsoft CEO Satya Nadella said OpenAI "remains a critical partner", and added, "We'll use Anthropic models, they'll use our infrastructure, and we'll go to market together."