Last year, as the world’s top artificial intelligence developers were racing to speed up their work using ever-bigger clusters of computers, OpenAI CEO Sam Altman was trying to play a longer game. He decided to start a new company that could develop and produce a new AI chip and help set up chip factories to make them and data centers to house them.His plan has taken numerous twists and turns since then. But there are signs his effort to build a new chip is taking shape, starting within OpenAI r...