OpenAI and SoftBank Group Corp. have jointly invested $1 billion in SB Energy, deepening their push to secure power and infrastructure for the rapid expansion of artificial intelligence in the United States. Under the deal, OpenAI and SoftBank Group Corp. will each commit $500 million to SB Energy, supporting the company’s growth as a data center developer and operator. The firms did not disclose a valuation for the investment. As part of the agreement, OpenAI has selected SB Energy to build and operate ...