Top A.I. Researchers Leave OpenAI, Google and Meta for New Start-Up

Founded by a co-creator of ChatGPT, Periodic Labs aims to build artificial intelligence that can accelerate discoveries in physics, chemistry and other fields.

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Meta Ramps Up Spending on A.I. Politics With New Super PAC

The new PAC, which is the second that Meta has unveiled in the last month, is aimed at backing those in support of the artificial intelligence industry.

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Trump’s $100,000 H1-B Visa Fee Spurs Confusion and Chaos for Companies

The White House sought to clarify the proclamation on Saturday, but many companies remained cautious. “We are still flying in somewhat foggy conditions,” one attorney said.

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Meta Unveils Smart Glasses With Apps and an Artificial Intelligence Assistant

At its annual developer conference on Wednesday, Meta showed several new smart glasses, which have been a surprise hit for the company.

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Social Platforms Duck Blame for Inflaming Divisions Before Charlie Kirk’s Death

After authorities said Mr. Kirk’s suspected shooter had been “radicalized” online, Meta, Reddit, TikTok and other platforms have stayed quiet — though not Elon Musk, who owns X.

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F.T.C. Starts Inquiry Into A.I. Chatbots and Child Safety

The Federal Trade Commission said it was starting an inquiry of how six major tech companies monitor activity that could harm minors.

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Videos of Charlie Kirk’s Shooting Spread Rapidly on Social Media

First posted to X, they amassed millions of views on Instagram, Threads, YouTube and Telegram within hours.

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Senators Demand Answers From Mark Zuckerberg on WhatsApp Security

Three Republican senators sent a letter to Meta’s chief executive on Wednesday asking him to respond to whistle-blower allegations over security flaws.

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Why Mark S. Zuckerberg Is Suing Facebook’s Parent Company

Facebook has repeatedly flagged his accounts, he says, for “impersonating” the company’s founder, Mark E. Zuckerberg.

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Whistle-Blower Sues Meta Over Claims of WhatsApp Security Flaws

In a lawsuit filed Monday, the former head of security for the messaging app accused the social media company of putting billions of users at risk. Meta pushed back on his claim.

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