Nov 13 (Reuters) - Billionaire Elon Musk's xAI has

raised $15 billion in a series E funding round, CNBC reported on

Thursday, citing sources.

The Tesla chief in September said the company was

not raising any capital after CNBC reported that xAI was raising

$10 billion at a post-money valuation of $200 billion.

XAI, in what seemed like an automated reply, said

"Legacy Media Lies" in response to a Reuters request for comment

on the raise.

The AI startup has been ramping up its data center

capacity to train more advanced models, as it looks to compete

more effectively with OpenAI's ChatGPT and Anthropic's Claude.