State attorneys general spent months in negotiations. Then, as its legal losses mounted, the social media giant’s new top lawyer brought a huge settlement to the table.

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The social networking giant projected it could spend $10 billion annually on Anthropic’s tools, illustrating the friend-foe relationships underlying the A.I. race.

Meta agreed to set more time limits and enhance protections in its platforms for young users, but was short on some specifics.

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