Elon Musk's AI company, xAI, has secured $6 billion in its Series C funding round.The funding round is backed by investors like A16Z, Blackrock, Fidelity, and Sequoia Capital, as well as strategic investors NVIDIA and AMD.xAI plans to use the funds to expand its supercomputer, Colossus, with more powerful Nvidia GPUs.With a valuation of $50 billion, xAI is a strong competitor to OpenAI and is rapidly growing in the AI market.