Elon Musk has launched “Grokipedia,” an AI-based alternative to Wikipedia. The billionaire had said last month that his team at xAI was building something that would be a “massive improvement over Wikipedia.” “Frankly, it is a necessary step towards the xAI goal of understanding the Universe,” via X.

Wikipedia founder Jimmy Wales has rejected claims by Elon Musk that the online encyclopedia has a left-wing bias, describing the Tesla and X owner’s remarks as “just factually wrong.”

In a Tesla earnings call Wednesday, the world’s richest man pondered the future of his company’s Optimus robots—and his control over them.