The Oracle offices in Redwood City, California.Photographer: David Paul Morris/BloombergOpenAI has agreed to rent a massive amount of computing power from Oracle Corp. data centers as part of its Stargate initiative, underscoring the intense requirements for cutting-edge artificial intelligence products.The AI company will rent additional capacity from Oracle totaling about 4.5 gigawatts of data center power in the US, according to people familiar with the work who asked not to be named discussi...