The Download: OpenAI’s US military deal, and Grok’s CSAM lawsuit

OpenAI has agreed to provide the Pentagon access to its AI, with potential military applications including strike target selection and a partnership with drone-maker Anduril. xAI faces a lawsuit alleging Grok was used to generate child sexual abuse material from real photos. Other major developments include China approving the world's first commercial brain chip for treating paralysis, Nvidia predicting $1 trillion in AI chip revenue, and Anthropic recruiting a weapons expert to prevent catastrophic misuse.