Elon Musk's artificial intelligence startup, xAI, said on Saturday that its new version of the Grok-2 chatbot will be available for free to all users of the social media platform X.

"As always, Premium and Premium+ users get higher usage limits and will be the first to access any new capabilities in the future," the artificial intelligence startup said in a blog.

xAI has been quietly testing a new version of the Grok-2 model over the past few weeks, it said.