Elon Musk’s AI startup, xAI, has raised $6 billion in a new funding round, it said today, in one of the largest deals in the red-hot nascent space, as he shores up capital to aggressively compete with rivals including OpenAI, Microsoft, and Google. Valor Equity Partners, Vy Capital, Andreessen Horowitz, Sequoia Capital, Fidelity, Prince Alwaleed Bin Talal and Kingdom Holding are among the backers who have invested in xAI’s Series B funding.