A federal task force in the city has been targeting crime and undocumented immigrants since October. Observers say they have faced retaliation for trying to track the agents’ work.

Over five frantic days, I gambled my family’s life savings on a hunch that A.I. could outperform a real estate agent.

Anthropic raised $65 billion in new fund-raising that put its value at $900 billion, ahead of OpenAI’s last valuation of $730 billion, as the companies duel for A.I. dominance.