Microsoft Build unveiled MAI-Thinking-1 and the full MAI family, marking Microsoft's formal entry as a frontier AI lab with custom silicon, proprietary models trained without distillation, and Windows repositioned as the execution platform for autonomous agents. Anthropic published year-long data mapping how AI is supercharging cyberattacks — medium-to-high risk actor share grew from 33% to 56% in six months — while expanding Project Glasswing's defensive AI program to 150 more organizations across 15 countries. Trump signed a downsized AI executive order stripping mandatory pre-release review to a voluntary framework, and Stanford Law confirmed AI outperforms law professors 75% of the time on contract law tasks.