By Zach Mink
Publication Date: 2026-05-01 09:00:00
Good morning, {{ first_name | AI enthusiasts }}. The government spent months escalating its fight with Anthropic. Then Mythos showed up with cyber capabilities powerful enough to make the feud look a lot less simple.
The White House is now trying to thread an awkward needle: keep the model close for national security, limit who else can use it, and avoid looking like it is fully backing down from the Pentagon’s hard line all at the same time.
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ANTHROPIC VS. THE WHITE HOUSE
Image source: Images 2.0 / The Rundown
The Rundown: The White House is pushing back on Anthropic’s plan to more than double the private sector’s access to its Mythos AI over compute concerns for its own use, just as a national security memo prepares to address parts of the Pentagon feud.
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Anthropic wanted access expanded from about 50 firms to nearly 120, with U.S. officials citing compute strains that could impact government use.
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A White House AI memo will reportedly push multi-vendor AI adoption for agencies and address some of Anthropic’s worries that led to the initial feud.
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Axios reported that the government action would “allow agencies to get around the supply chain risk designation”, despite the current legal battle.
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GPT 5.5 reached similar cyber capabilities to Mythos, with…
