Musk launches Grok 3 AI chatbot. Here's what to know.

Elon Musk has debuted a new version of his artificial intelligence chatbot, called Grok 3, days after rival OpenAI rejected the billionaire's bid for the company, which he cofounded with Sam Altman and others in 2015. 

Musk's startup, xAI, claimed in a livestream announcement on Musk-owned social media platform X that Grok 3 is superior to competitors including OpenAI's GPT-4o, Alphabet's Google Gemini, DeepSeek's V3 model and Anthropic's Claude. 

With its latest AI chatbot, xAI's mission according to Musk, is to "understand the universe," including by answering questions such as, "Where are the aliens?" "How does the universe end?" and "How did it start?"