OpenAI requires investors to contribute at least $250 million. In addition, OpenAI will decide which investors can participate in its latest $6.50 billion round of financing. According to people familiar with the matter, OpenAI's latest round of financing is close to completion, and potential investors will know on Friday whether they will participate in the deal. According to people familiar with the matter, the artificial intelligence startup's $6.50 billion financing has been oversubscribed, ...