Elon Musk’s artificial intelligence startup xAI will open-source the code for its snarky Grok chatbot “this week,” its billionaire founder said. The move makes Grok’s source code freely available — ...

Mr. Musk’s move to open up the code behind Grok is the latest volley in a war to win the A.I. battle, after a suit against OpenAI on the same topic. By Kate Conger and Cade Metz Reporting from San ...