The board change is the latest development for Mount Sinai hospital which features prominently in the Epstein files

The hedge fund billionaire Glenn Dubin, one of several Wall Street figures whose relationship with Jeffrey Epstein is facing scrutiny, has stepped down from the board of Mount Sinai hospital, according to sources close to the renowned New York institution.

The revelation follows news earlier this year that Mount Sinai, which has long ranked as a top medical provider in New York City, had reportedly formed a committee to review its longstanding ties to the late accused sex trafficker. The hospital features prominently in the Epstein files released by the Department of Justice, including an incident in which a Mount Sinai doctor appears to have operated on a young Russian woman inside Epstein’s Upper East Side townhouse after she got hurt during a stay on his Caribbean island.

OpenAI, the US company behind ChatGPT, will hand Ukraine's government free access to a cyber-defense system and its most powerful artificial-intelligence (AI) model, Ukrainian defense outlet Militarnyi reported. The company unveiled the deal alongside the UN General Assembly, pitching it as a cyber shield for the hospitals and power plants Russia keeps targeting.

Russia's war on Ukraine runs through wires as much as skies. Its hackers have hammered energy, transport, and defense networks for years, on top of the blackouts its missiles already force on Ukrainian cities—and Western tech firms have kept stepping in to help hold the line.

What the Daybreak system does

The tool is called Daybreak. It scans digital systems, finds their weak points fast, and helps specialists close them, the report said. Daybreak handles the whole job on its own—a loop of inventory, detection, verification, assignment, remediation, and confirming the fix held.

The system is meant to shield civilian infrastructure, hospitals and power stations among it, from cyberattacks, BBC reported. Ukraine's Computer Emergency Response Team (CERT-UA) logged nearly 6,000 cyberattacks in 2025.

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Ukraine also gets OpenAI's top model

The agreement opens access to GPT 5.6 Sol, OpenAI's flagship and strongest model. The company built it for complex professional work—programming, research, science, and cybersecurity, the report said. Both come as part of one agreement between OpenAI and Kyiv.

George Osborne—Britain's former chancellor and now Head of OpenAI for Countries—put the aim plainly.

"Protecting civilian infrastructure means defending it against both physical and digital attacks, so people can continue to live, work and access essential services," he said.

Independent analysts called the deal useful but not unprecedented. Rafe Pilling of cyber firm Sophos said it could serve as a force multiplier for a Ukrainian cyber defense that is already highly capable but heavily burdened. Jamie MacColl of the Royal United Services Institute noted that Western tech firms have been supporting Ukraine for some time, partly altruistically but also because they gain valuable intelligence from an active conflict, and that Ukraine already has access to AI tools from OpenAI's competitors, including Google. The same frontier AI capabilities cut both ways—spotting weaknesses helps defenders block hackers and attackers find a way in.

OpenAI's rival Anthropic has restricted access to its most powerful cyber models on those grounds, while OpenAI has opened them to some European firms and UK banks, BBC reported.