Anthropic has cut off access to its Fable 5 and Mythos 5 models following a U.S. government order, citing alleged jailbreak vulnerabilities that prompted export control concerns. The move has sparked debate within the AI community over inconsistent policy enforcement, the practicality of preventing determined jailbreaks, and the effectiveness of blanket restrictions as a regulatory approach. The company is simultaneously pursuing direct U.S. data center leases backed by Google, seeking to strengthen its infrastructure independence amid the broader regulatory environment. In a major business reshuffling, SpaceX completed an initial public offering at a valuation near $1.75 trillion and announced the acquisition of Cursor, an AI-powered coding startup, for $60 billion. The strategic move positions xAI to leverage Cursor's engineering talent, proprietary datasets, and established product to compete more effectively in the rapidly growing AI coding assistant market. Meanwhile, ChatGPT's market dominance continues to erode, with the OpenAI chatbot slipping below 50 percent market share for the first time as Google's Gemini and Anthropic's Claude gain ground. Leaked financial documents revealed OpenAI is reporting substantial annual losses despite robust revenue growth, underscoring the capital-intensive economics of frontier AI development. The week also saw a burst of open-source developments, with new model releases from Moonshot, Qwen, and NVIDIA advancing capabilities in coding, robotics, and reasoning. A Munich court ruled Google liable for false statements in its AI Overviews search feature, while the U.S. Department of Justice backed xAI's infrastructure investments as vital to national security interests. The convergence of regulatory tightening, market consolidation, and rapid open-source innovation underscores the multifaceted transformation of the AI industry.