DealBook: Washington wants Mythos
Also, readers on New York’s proposed pied-à-terre tax.
DealBook
April 17, 2026

Good morning. Andrew here. While government and corporate leaders worry about the cybersecurity threats raised by Anthropic’s Claude Mythos Preview, there is another conundrum that has gone unexplained. I’ve been speaking to bank executives and A.I. researchers who tell me we are entering an era of the “reverse-engineered exploit,” or the “patch gap.”

Once Mythos identifies a bug, a patch needs to be issued to fix it. But hackers have a window of time to study the fix and strike before it’s implemented. That’s always been the case. But in the past, only one or two patches were dealt with at a time. Now it’s likely to be hundreds or thousands of patches.

So this becomes a race against time where the very act of repairing a system provides a blueprint for breaking it. Think about that. (Was this newsletter forwarded to you? Sign up here.)

A person walks past an open door into an office. A closed door has Anthropic’s logo on it.
Government agencies are seeking access to Anthropic’s most powerful artificial intelligence model, Claude Mythos Preview. Marissa Leshnov for The New York Times

Preparing for next-generation cyberthreats

The rollout of Anthropic’s most powerful artificial intelligence model is continuing to reverberate not just in C-suites, but in the halls of government.

Anthropic has warned that the model, Claude Mythos Preview, could uncover cybersecurity vulnerabilities — and potentially create new ones — at unprecedented speed and scale. That’s increasingly persuading officials in Washington and elsewhere that they need access to help guard against next-generation cyberthreats.

The White House is working to make Mythos available to federal agencies, according to Bloomberg. (DealBook has heard the same thing.) Anthropic has limited access to Mythos to a few dozen companies so far, though it briefed government officials on its capabilities before the model’s release.

That prompted Treasury Secretary Scott Bessent and Jay Powell, the Fed chair, to convene top banking executives in Washington last week to discuss the tool and its implications for their cyberdefenses.

Now the Office of Management and Budget is setting up guardrails to let some agencies start using the A.I. model “in the coming weeks,” according to an email sent this week from Gregory Barbaccia, the federal chief information officer at the O.M.B.

Mythos is scrambling the Trump administration’s approach to Anthropic. Remember that the Pentagon declared the A.I. company a supply chain threat, forcing government contractors to avoid using its tools in any military-facing work. Anthropic and the Defense Department remain locked in legal battles in two federal courts. (That said, Dario Amodei, Anthropic’s C.E.O., is set to meet today with Susie Wiles, the White House chief of staff, according to Axios.)

But other federal agencies, including the Treasury and State Departments, have asked Anthropic for briefings on and access to Mythos, DealBook understands. Asked at a Semafor event this week about whether government agencies would be able to use Mythos, Sean Cairncross, the U.S. national cyberdirector said, “Sure,” adding that the government was working with tech companies to give agencies access to advanced A.I. “in a responsible fashion.”

Some officials said that the Pentagon battle had made it more complicated for agencies to start using Mythos. But even critics of Anthropic’s insistence on tougher guardrails for A.I. technology acknowledge that its products are too good not to use.

It isn’t just U.S. officials who are worried about Mythos:

  • “If it falls in the wrong hands, it could be really bad,” Christine Lagarde, the president of the European Central Bank, told Bloomberg this week about Mythos’s potential for harm.
  • “We should be worried,” Kanishka Narayan, Britain’s minister for A.I. and online safety, told The Financial Times.
  • Andrew Bailey, the governor of the Bank of England, joked that Anthropic “may have found a way to crack the whole cyberrisk world open and you think, what did I do wrong in a past life?”

One thing foreign officials and tech analysts are worried about is a lack of cooperation between countries, particularly the U.S. and China, on how to regulate increasingly powerful A.I. models. “Frontier A.I. capabilities are advancing faster than governance frameworks are being designed to control them,” Laila Khawaja, the research director of Gavekal Technologies, told Bloomberg.

Time is ticking for governments to prepare for Mythos-level threats. Anthropic itself has cautioned that other developers, including U.S. adversaries, will quickly catch up to its new model’s capabilities, perhaps within two years.

HERE’S WHAT’S HAPPENING

U.S.-Iran peace talks may resume this weekend, President Trump says. Discussions between the two sides would take place in Pakistan, Trump said, claiming that Iran has become more open to unspecified concessions. Brent crude, the international benchmark for oil, is down today on that news and because of a new cease-fire between Israel and Lebanon. But at an event in Las Vegas, Trump played down higher fuel costs as “fake inflation.”

Reed Hastings will step down from Netflix’s board in June. Hastings, who co-founded the company as a DVD subscription service in 1997 and turned it into a streaming colossus, said he would “focus on new things.” (He’s already expanding the Powder Mountain ski resort, where he owns a home.) Separately, Netflix disclosed that its latest quarterly earnings fell short of analyst expectations, prompting a sell-off in its shares in after-hours trading.

U.S. officials may scrutinize other sports leagues over their media rights strategy. Brendan Carr, the chair of the Federal Communications Commission, said this week that he was concerned about leagues hurting consumers with how they sell some broadcasting rights to streaming services, raising prices. The Justice Department is already investigating the N.F.L. along similar lines. Separately, the White House is reportedly weighing Michael Murray, an official in the first Trump administration, as the Justice Department’s next antitrust chief.

Crypto and artificial intelligence groups raise big war chests for the midterm elections. Political action committees tied to the industries have collected about $250 million over the past year, including from Elon Musk, the investor Marc Andreessen and the Wall Street brokerage Cantor Fitzgerald, according to an analysis by The Financial Times. Crypto and A.I. companies are seeking allies in Congress amid debates over how to regulate their businesses.

Gov. Kathy Hochul, wearing an olive suit, and Mayor Zohran Mamdani in a navy suit and light blue tie walk onto a stage in front of an American flag.
Mayor Zohran Mamdani is backing a tax on second homes proposed by Gov. Kathy Hochul. Adam Gray for The New York Times

Readers respond: The pied-à-terre tax

On Wednesday, Andrew asked about Gov. Kathy Hochul’s proposal for a “pied-à-terre” tax on secondary residences in New York City valued at $5 million or more. It’s an initiative that has been floated before, and has already drawn support and alarm.

“Critics warn that it could stifle big-ticket investments,” Andrew wrote, “while supporters argue that it is the fairest way to raise revenue.” A lot of readers responded. Here’s what you had to say. (Responses have been condensed and edited.)

  • “An escalating pied-à-terre tax is a very good idea that, sadly, will have a very small impact on the city budget deficit. Small price adjustments to sales offers to counterbalance the tax will offset any perceived pain. As both a retired real estate agent and finance executive, I know this from experience.” — Peter Goldman
  • “Wealthy New Yorkers pay the lion’s share of gross taxes while using the fewest state and city services. These residents are the ideal ‘customers’ — they offer high, recurring revenue at an incredibly low cost to serve. When they leave, the state’s cost burden doesn’t drop, but the revenue does. That shortfall will inevitably fall on middle-class families, making New York even less affordable.” — Neil Lustig
  • “The demand curve is steep. They won’t sell, because they love New York. If they do sell, there’s a flock of other multimillionaires to pick up the slack. We need a demonstration of progressive policies that work for folks.” — Raph Richman
  • “As a retired C.P.A. and C.F.O., I find it interesting that the conversation is always about more revenue. Less spending is never mentioned.” — John Chanon
  • “If you can afford the home, you can afford to support the community.” — Laurel Kirkman
  • “I love that idea. Raise money by taxing the rich, but it’s fairer. If you don’t live here full time, yet take housing off the table, you need to pay more for it.” — Carol Scott

“I’ve actually become Boeing’s number-two salesperson in the world, right after the president … unpaid, but it’s true,”

Paolo Zampolli, a longtime associate of President Trump who claims to have helped strike billions of dollars’ worth of business deals around the world as a presidential envoy. (Boeing did not confirm the accuracy of Zampolli’s statement.)

A chat bubble that reads, "How do you use AI? What are your best use cases?" The bubble underneath indicates a pending response.

Talking A.I. with the C.E.O. of BCG

Every week, we’re asking a leader how he or she uses artificial intelligence. This week, Christoph Schweizer, who leads BCG, told DealBook’s Sarah Kessler that A.I. hadn’t changed the global consulting firm’s hiring patterns. The interview has been condensed and edited.

How are you personally using A.I.?

I was at this big conference the other day, and I saw I was seated next to this bank C.E.O. for lunch. I quickly used A.I. to say, hey, how did the last quarter go for that bank? How did the stock market react? What did analysts say? I had a totally different way into the conversation.

I don’t use A.I. to summarize emails. For me, it’s really about making human interactions better.

What have you told your team about how you want them to approach A.I.?

We have given access to a suite of A.I. tools to every one of our 34,000 employees. And we have not prescribed how they should use it. We have said we urge you to embrace it.

Now 81 percent of our staff say that A.I. is helping them generate more value in their work, and 73 percent say they find work more enjoyable thanks to A.I. This is about more joy and less toil.

Has A.I. changed whom you hire?

You read these headlines every day about how professional services of all sorts will be automated away by A.I. We have made the decision that we are not changing our recruiting, promotion or electing-to-partner patterns. The junior talent that comes out of college is incredibly A.I.-native.

Nobody knows where the world will be in three or five years from now. But fundamentally, A.I. has been business-creative and not dilutive for us. That’s why we are convinced that our junior talent remains highly relevant.

We hope you’ve enjoyed this newsletter, which is made possible through subscriber support. Subscribe to The New York Times.

THE SPEED READ

Deals

  • A group of French phone companies has raised their takeover bid for SFR, the ailing carrier owned by the billionaire Patrick Drahi, for 20.4 billion euros, or $24 billion. (Bloomberg)
  • Cerebras, a maker of A.I.-focused chips, reportedly plans to publicly disclose its I.P.O. prospectus as soon as today, as well as a goal of raising over $3 billion at a valuation of at least $35 billion. (The Information)
  • OnlyFans, the subscription platform used by many adult entertainers, is said to be near a deal to sell a stake to the investment firm Architect Capital at a $3 billion valuation. (FT)

Politics, policy and regulation

  • “Tom Steyer is running the most expensive campaign in America. It might win him the California governorship.” (Politico)
  • NPR received $113 million from two gifts, including an $80 million donation by Connie Ballmer, the philanthropist and wife of the billionaire Steve Ballmer, that is the largest by a living donor in the network’s history. (NYT)

Best of the rest

  • Sam Altman’s Side Hustles Blur the Line Between OpenAI’s Interests and His Own” (WSJ)
  • Gatorade invented the sports drink industry. Now it’s looking beyond athletes to grow its customer base. (AP)
  • How an inheritance battle over an Oregon winery led to possibly the largest fine yet against lawyers for passing off A.I. slop as sound legal reasoning. (NYT)