March 11 (Reuters) - Elon Musk said on Monday his

artificial intelligence firm xAI will open-source "Grok", a

chatbot rivaling OpenAI's ChatGPT, this week.

The development comes about two months after the Tesla

CEO said he felt uncomfortable growing the carmaker

into a leader in AI and robotics unless he had at least 25%

voting control of the company.

Earlier this month, Musk sued ChatGPT-maker OpenAI and

its CEO Sam Altman, saying they had abandoned the startup's

original mission to develop artificial intelligence for the

benefit of humanity and not for profit.

In a podcast episode with computer scientist and

podcaster Lex Fridman, Musk suggested in November that he liked

the concept of open-source AI. The billionaire's startup

launched the AI model to a small group of users that month.

In December, xAI rolled out its ChatGPT competitor Grok for

Premium+ subscribers of social media platform X, aiming to

create what Musk has said would be a "maximum truth-seeking AI".