• Washington
  • Wall Street
  • A.I.
  • Hollywood
  • Media
  • Fashion
  • Sports
  • Art
  • Join Puck Newsletters What is puck? Authors Podcasts Gift Puck Careers Events
  • Join Puck

    Directly Supporting Authors

    A new economic model in which writers are also partners in the business.

    Personalized Subscriptions

    Customize your settings to receive the newsletters you want from the authors you follow.

    Stay in the Know

    Connect directly with Puck talent through email and exclusive events.

  • What is puck? Newsletters Authors Podcasts Events Gift Puck Careers

July 15, 2025

The Hidden Layer
Ian Krietzberg Ian Krietzberg

Welcome back to The Hidden Layer, my new twice-weekly email devoted to the opaque, high-stakes world of artificial intelligence. I’m Ian Krietzberg.

Thanks for all the great feedback on my last issue. Keep it coming! If you’ve got questions, tips, critiques, thoughts about the Knicks or Rob Thomas (he has new music, okay?), or anything else you want to get off your chest, just reply to this email. You can also message me on Signal at 732-804-1223. Also, if you’re not yet subscribed to Puck, click here to change that.

In today’s issue, a close look at how hospitals are actually using A.I., and what that means for patient care. Plus, the realities behind so-called L.L.M. “reasoning.”

Mentioned in this issue: Elon Musk, Grok, OpenAI, xAI, Windsurf, Mark Zuckerberg, Dr. John Brownstein, Boston Children’s Hospital, “cognitive offloading,” Google, Keyon Vafa, Elsevier, Meta, Mike Lindell (yes, that Mike), and many more…

But first…

 

Non-Deal of The Week

Back in May, it seemed like OpenAI was close to its largest-ever acquisition: a $3 billion deal to absorb Windsurf, a popular A.I. coding company. But on Friday, Google announced an agreement to hire Windsurf’s co-founder and C.E.O., Varun Mohan, plus other key Windsurf employees, in a deal reportedly worth $2.4 billion. (Google is also getting a nonexclusive license for Windsurf’s technology.) Then, on Monday, A.I.-coding startup Cognition—the makers of the much-hyped Devin product—announced that it was acquiring Windsurf’s remaining assets. Jeff Wang, who was instated as Windsurf’s C.E.O. three days ago, described those 72 hours as “the wildest rollercoaster ride” of his career. No kidding.

Of course, acqui-hires are increasingly popular among the leading giants in the A.I. space: Google did it last year with Character.AI, Microsoft did it last year with Inflection, and Amazon also did it last year with Adept. Still, it’s remarkable how quickly the talent war is upending the venture ecosystem, in which investors and early employees bet on a big exit for the company, not just its founders or star employees.

 

Three Things You Should Know

  • “Potemkin” reasoning: Last week, after I wrote about Grok 4, the latest iteration of Elon Musk’s A.I. chatbot, I received an interesting note from a reader. This person pointed out that, in addition to acing a few other benchmarks, Grok 4 achieved a 16 percent on the ARC-AGI-2 benchmark—doubling the previous high score of 8 percent secured by Claude 4 Opus. Among other things, the ARC-AGI-2 seeks to measure genuine machine intelligence via logic puzzles that are easy for humans but exceedingly difficult for A.I. models. Of course, we don’t know anything about Grok’s training data, which means it might have been exposed to similar logic puzzles. (Grok 4 was also tested on ARC’s semi-private evaluation, which allows some degree of exposure to the benchmark before testing.)

    I was reminded of a recent conversation I had with Keyon Vafa, a postdoctoral fellow at the Harvard Data Science Initiative, who has been studying the reasoning capability of L.L.M.s. Along with researchers from MIT and UChicago, he recently published a paper that aimed to reconcile high benchmark performance with inconsistent, real-world efficacy. The problem, the researchers pointed out, is that many of these benchmarks are also used to test humans. “These benchmarks are only valid tests if L.L.M.s misunderstand concepts in ways that mirror human misunderstandings,” they wrote. “If L.L.M. misunderstandings diverge from human patterns, models can succeed on benchmarks without understanding the underlying concepts.”

    Their research found traces of what they termed “potemkin” reasoning across a variety of models—instances that suggest a capacity for answering questions correctly without “true concept comprehension.” Across other research, Vafa found that, for now, L.L.M.s don’t possess an inherent “world model,” which I also wrote about last week. Obviously, properly evaluating the reasoning capabilities of L.L.M.s is vitally important for adoption—but conducting meaningful evaluations is easier said than done, in part because they’re used for such a wide variety of tasks.
  • American Prometheus: On Monday, Mark Zuckerberg announced that Meta will invest “hundreds of billions of dollars” into A.I.-enabled G.P.U.s to achieve his mission of machine “superintelligence.” The first multi-gigawatt cluster, called Prometheus, will apparently come online next year; Hyperion, a second cluster that could scale up to 5 gigawatts, is also in the works. The largest supercomputing cluster in existence, xAI’s Colossus, boasts 200,000 G.P.U.s and reportedly requires some 300 megawatts of energy, most of which is supplied by a series of on-site gas turbines. (One gigawatt of energy is enough to power nearly a million homes in the U.S.)

    It’s unclear where Meta’s data centers will be located, how they will be powered, or what impacts there might be to nearby populations. “Just one of these covers a significant part of the footprint of Manhattan,” Zuckerberg wrote. Meta didn’t return a request for comment.
  • Grok slouches toward Washington: Just days after xAI was forced to apologize for antisemitic rants from its Grok chatbot, the company announced on Monday that it had secured a contract from the U.S. Department of Defense, and that its products will be available for purchase by every federal department and agency. In a press release, the D.O.D. said that it had awarded contracts of up to $200 million each to Anthropic, Google, OpenAI, and xAI, all meant to “accelerate” the D.O.D.’s adoption of A.I. for “national security” purposes.
 

Hallucination of the Week

Two attorneys representing MyPillow C.E.O. Mike Lindell in a recent defamation case were sanctioned and fined last week by a federal judge after they were caught using a generative A.I. system to prepare a court filing, which included citations to cases that don’t exist. The lawyer-gets-busted-using-A.I. trope has been playing out almost from the moment ChatGPT burst onto the scene. One researcher has assembled a database of such scenarios that includes more than 200 cases. Somehow, they never learn. Maybe the fines are too low?

And now for the main event…

The A.I. Will See You Now…

The A.I. Will See You Now…

Nearly half of clinicians are now using A.I. for their work. Patients are turning to ChatGPT to self-diagnose mysterious ailments. And everyone from the chief innovation officer of Boston Children’s Hospital to R.F.K. Jr. is excited about the revolution unfolding in plain sight. What could go wrong?

Ian Krietzberg Ian Krietzberg

Long before ChatGPT infiltrated classrooms and became an obsession at cocktail parties, Boston Children’s Hospital embarked on what Dr. John Brownstein, its chief innovation officer, described as an “A.I. journey.” For years, Brownstein told me, the hospital had been using machine learning in data-rich environments—like radiology, pathology, or the intensive care unit—to generate “predictions” about patient outcomes. Then came the generative A.I. explosion. Now, Brownstein said, his team is anticipating that A.I. is “going to be part of the fabric of almost all the technologies we use in the hospital.” For many people in the A.I. field, the integration with medicine represents a potential holy grail.

Obviously, these technologies are still error-prone, and the stakes are much higher when you’re incorporating A.I. into potentially life-or-death healthcare decisions, rather than, say, enabling Gemini in your Gmail. But physicians are finding early success with A.I. tools, and the rate of adoption is steadily ticking up: According to Elsevier’s fourth-annual “Clinician of the Future” report, which was released today, 48 percent of clinicians had used A.I. for work in 2025, nearly double the 26 percent reported the year before, and more than triple the figure from the year before that. The 2,000 or so physicians who responded to the survey described their primary use cases for A.I. as identifying drug interactions, analyzing medical images, and providing a patient’s medication summary.

This rapid adoption curve, Brownstein said, can be attributed in part to the industry’s seeming openness to this technology. At Boston Children’s, 30 percent of the hospital’s workforce has already started using A.I., although mostly via “low-risk” applications, like administrative tools. The hospital was also one of the earlier adopters of (controversial) ambient listening tools, which use A.I. to auto-transcribe patient-doctor visits, and has partnered with OpenAI to advance their work on the diagnosis of rare diseases. “We’ve been very careful about the deployment of these tools, recognizing that some come with more risk than others,” Brownstein said, adding that the hospital has also started using physician-facing tools, at least in part, for “care guidance”—a step toward wide-scale, predictive, personalized healthcare.

Still, plenty of doctors remain cautious. In Elsevier’s 2024 survey, 85 percent of clinicians said that A.I. could cause critical errors, and 93 percent were worried about misinformation. In this year’s survey, only 40 percent of clinicians claimed that A.I. could be trusted to assist with clinical decision-making, and only 30 percent said their institutions were providing adequate training—an issue that Brownstein acknowledged as an impediment to adoption. “At the end of the day, whoever’s using them has to sign off and take responsibility for whatever the output is,” he told me. “It still resides with the clinician to provide that consideration. Yes, there’s a future world where a lot of patients are going to turn directly to these tools, but that’s not where we are.”

The Revolution Comes to Washington

The feverish integration of A.I. tools across the medical industry has become a focus for virtually every big tech player in the space. Microsoft is pursuing “medical superintelligence”; OpenAI says that “improving human health will be one of the defining impacts of A.G.I.”; Nvidia is “transforming” healthcare with A.I.; Amazon is “reimagining primary care” with A.I.; and Google is “transforming” healthcare. All are ostensibly focused on personalizing medicine with better analytics and predictive diagnostics; enhancing productivity to overcome staffing shortages; and improving operational efficiencies to address burnout while improving patient care.

The excitement has penetrated Washington, D.C., too. Secretary of Health and Human Services Robert F. Kennedy Jr., who heralded the arrival of a so-called “A.I. revolution” at the department, has declared that “President Trump is determined to end the hemorrhaging of rural hospitals, and he’s asked me to do that through the use of A.I.” It all sounds compelling, but things haven’t exactly gone according to plan on the ground. A 2024 survey from National Nurses United—the country’s largest union of registered nurses—found that only 40 percent of respondents trust their institutions will implement A.I. with patient safety “as their first priority.” The survey details cases of missing patient information, and inaccurate algorithmic analyses that “often contradict and undermine nurses’ own clinical judgment and threaten patient safety.”

Michelle Mahon, the director of nursing practice at NNU, told me that while nurses are not anti-tech, their primary concern is whether a given technology will actually improve patient care. “There is no demonstrated effectiveness” when it comes to A.I., she said. “It is not proven to be safe and effective prior to its implementation, and this has caused disruptions.” When asked about the technology’s propensity to “hallucinate,” she quickly noted that “we are talking about people’s lives. Even a small aberration in facts can be life-threatening.”

As with the electronic health record, Mahon said that A.I. is “primarily designed to capture revenue. There’s been a long-standing goal of the industry to reduce labor costs by cutting back on nursing.” As long as the goal involves saving money by “distilling care,” she said, no technological intervention is “going to work in the best interest of patients.” Citing Kennedy’s statements on the supposed capabilities of “A.I. nurses,” she said she does not see a path to the integration of A.I. technologies that would overcome or even address any of these concerns: “This is a red line for us.”

At the heart of these concerns is the slightly more abstract, somewhat longer-term threat of “cognitive offloading” and skill degradation associated with the use of generative A.I. Indeed, several studies this year have identified a decrease in critical thinking associated with using and trusting the technology. According to Dr. Rahul Goyal, Elsevier’s chief medical officer, an overreliance on A.I. in a medical context could potentially cause healthcare workers to lose their “knack.” While “A.I. is a brilliant servant,” he told me, it’s “not the best master.”

When it comes to the question of skill degradation—in which clinicians might become trained to respond to A.I.-powered alerts rather than their own intuition—the threat is multipronged, and dovetails with the problem of cognitive offloading. To wit: When tools seem to work only some of the time (or if the A.I. experiences a hallucination), clinicians in a crisis might not have the skills necessary to address a problem. And even if the tech worked perfectly all the time, the risk of overreliance doesn’t go away.

Last year, the Ascension health system lost access to its electronic health record for more than a month due to a ransomware attack. Mahon said that downtime systems weren’t in place, and staff didn’t know how to work from a physical chart. “As medical healthcare professionals, we are taught immediately, first and foremost, to treat the patient and not the monitor,” she told me. “What is happening with a person is more important than the data. This flips the script and emphasizes the value of data over all other kinds of knowledge. And that is dangerous.”

 

What You’re Saying…

There were lots of great responses to my first two columns last week. Here’s a sampling of the feedback in my inbox…

“I do not agree with this premise that videos or video games will eventually be generated for each individual user. People crave collective experiences, something they can engage other human beings about. If everyone is watching their own unique video or playing their own specially tailored game, it removes the ability to engage with others. Can someone who works in A.I. explain to me why they think people won’t care about the collective experience in favor of something uniquely for them? This is a deep misreading of why people engage with things, and I find it frustrating that these experts never comment on that while claiming this is the future of media.” —A film industry person

“Your most recent newsletter includes a Quote of the Week from someone named Alexandra Ebert at Mostly AI. Her remarks reflect the usual ignorance of history of many of our tech innovators. The early days of car safety did not involve a person with a red flag walking around to warn passengers, with seat belts coming online downstream. Once cars were commercialized, it became necessary to construct literal guardrails on roads. And traffic lights. And stop signs. And road infrastructure. As individuals it behooves us to take precautions to drive carefully: watch out for pedestrians and other cars, maintain a safe speed, and so on. But we shouldn’t expect that our personal decisions alone will be enough to ensure road safety.” —A longtime Puck subscriber

 

See you Thursday,
Ian

The Powers That Be

Join Emmy Award-winning journalist Peter Hamby, along with the team of expert journalists at Puck, as they let you in on the conversations insiders are having across the four corners of power in America: Wall Street, Washington, Silicon Valley, and Hollywood. Presented in partnership with Audacy, new episodes publish daily, Monday through Friday.

The Varsity

A professional-grade rundown on the business of sports from John Ourand, the industry’s preeminent journalist, covering the leagues, players, agencies, media deals, and the egos fueling it all.

Stories
HBO Max’s Identity Crisis

HBO Max’s Identity Crisis

JULIA ALEXANDER

LVMH Musical Chairs

LVMH Musical Chairs

LAUREN SHERMAN

Elon’s Party Crashers

Elon’s Party Crashers

ABBY LIVINGSTON

Puck
Facebook Twitter Instagram LinkedIn

Need help? Review our FAQ page or contact us for assistance. For brand partnerships, email ads@puck.news.

You received this email because you signed up to receive emails from Puck, or as part of your Puck account associated with {{customer.email}}. To stop receiving this newsletter and/or manage all your email preferences, click here.

 

Puck is published by Heat Media LLC. 107 Greenwich St, New York, NY 10006

SHARE
Try Puck for free

Sign up today to join the inside conversation at the nexus of Wall Street, Washington, A.I., Hollywood, and more.

Already a member? Log In


  • Daily articles and breaking news
  • Personal emails directly from our authors
  • Gift subscriber-only stories to friends & family
  • Unlimited access to archives

  • Exclusive bonus days of select newsletters
  • Exclusive access to Puck merch
  • Early bird access to new editorial and product features
  • Invitations to private conference calls with Puck authors

Exclusive to Inner Circle only



Latest Articles

Nadège Vanhee
Lauren Sherman • July 15, 2025
The Increasing Allure of Nadège Vanhee
The Hermès women's designer was in full command of her powers at the brand's Bel Air runway show on Thursday, and is building heat ahead of her couture debut next year.
resee parada fashion brands
Malique Morris • July 15, 2025
Fashion Attention Wars (And How Prada Gets Away With It)
News and notes on an industry drowning in content, and the brands that broke through, for better and for worse: Victoria’s Secret’s teen charm campaign, Patagonia’s drag infringement suit, Lululemon’s customer confusion, and how Prada pulled off the rarest trick in luxury.
Francis Picabia
Marion Maneker • July 15, 2025
Picabia’s Final Frontier
The yacht-owning, sports car–loving artist Francis Picabia defied the odds in nearly all aspects of his life and career—and only now are his striking pinup works being taken seriously.


French Hill
Leigh Ann Caldwell • July 15, 2025
French Hill Has Eyes
The chairman of the House Financial Services Committee joins Puck’s Power Breakfast series to walk through his ambitious legislative agenda: the stalemate over crypto, sticking points on housing reform, Republican reservations about the president’s immigration banking order, and his complicated position on Ukraine.
Lesley Stahl
Dylan Byers • July 15, 2025
Lesley Stahl & The ‘60 Minutes’ Guys Are Staying
In a brief manifesto, Stahl, Bill Whitaker, and Jon Wertheim acknowledged deep frustrations with the new leadership of the show, but worried that leaving now would make things even worse. An earlier draft of the memo was even more critical.
jerry Lorenzo
Lauren Sherman & Malique Morris • July 15, 2025
More Fear of God Exits
Jerry Lorenzo’s reassertion of control at the L.A. label has coincided with a string of departures.


David Ellison
Matthew Belloni • July 15, 2025
At What Point Will Ellison Intervene at CBS News?
With ‘60 Minutes’ in chaos and star correspondent Lesley Stahl hiring superagent Bryan Lourd to guide her future, the Paramount owner may soon need to decide how much he’ll let Bari Weiss disrupt the show—and the news division—before reining her in.


Get access to this story

Enter your email for a free preview of Puck’s full offering, including exclusive articles, private emails from authors, and more.

Verify your email and sign in by clicking the link we just sent.

Already a member? Log In


Start 14 Day Free Trial for Unlimited Access Instead →



Latest Articles

jeffrey kessler
Eriq Gardner • July 15, 2025
Ellison’s Legal Gladiator Is Ready for War
Jeffrey Kessler, the legendary antitrust and entertainment industry litigator, goes on the record to explain why he’s defending the Paramount–Warner Bros. merger, how politics is impacting the opposition, and what it all means for CBS News and CNN.
conor McGregor
John Ourand • July 15, 2025
Searching for Conor McGregor
The UFC is at the beginning of a seven-year, $7.7 billion media deal, the envy of every other emerging sports outfit in the world, and about to reach the ultimate mark of Trump II cultural dominance with a much-hyped fight card on the White House lawn. So where are all its new stars?
Sen. Chuck Schumer
Leigh Ann Caldwell • July 15, 2025
Anti-Anti-Weaponizaton Blowback & What White Women Want
The G.O.P. mini-revolt continues, albeit with limited results. And a new poll shows that a crucial swing bloc is mighty concerned about corruption.


Sebastian Gorka
Julia Ioffe • July 15, 2025
Trump’s New Rules for Radicals
The State Department spent Tuesday trying to convince diplomats that antifa is the new Al Qaeda—but Foggy Bottom isn’t buying it.
luca de meo
Lauren Sherman • July 15, 2025
Luca’s People
Luca de Meo’s grand turnaround plan for Kering was met with skepticism in April. But insiders are starting to see his penchant for installing executives from outside the industry as the only path forward.
Sam Altman
Ian Krietzberg • July 15, 2025
The Great A.I. PAC Crackup
With public opinion—and a slew of presidential hopefuls—beating back A.I.’s “no rules” agenda, the lobbyist armies of Andreessen Horowitz and OpenAI are suddenly supporting safeguards they rejected just a year ago.


Obsession
Scott Mendelson • July 15, 2025
Letters from the HollyTube Revolution
The breakout weekends for ‘Backrooms’ and ‘Obsession’ tell us something real about the origin of Hollywood’s next generation of talent—and something more complicated about its future.
Get access to this story

Enter your email to get access to one article and free previews of our private emails from Puck authors and editors.

OR

Already a Member? Sign in



Latest Articles

Scott Pelley
Dylan Byers • July 15, 2025
The ‘60 Minutes’ Adult Daycare Era
Bari Weiss’s takeover of CBS News, just eight months ago, has somehow already produced a decade’s worth of mess, reaching embarrassing new lows with Scott Pelley’s self-mythologizing tantrum and subsequent firing. How long before David Ellison sends in a pro to clean up after her?
Rep. Randy Feenstra
Marianna Sotomayor • July 15, 2025
G.O.P. Jitters in Iowa and New Jersey
Trump’s endorsement streak comes to an end in the Hawkeye State, and an AWOL congressman gets an ex-Navy pilot challenger.
Maine Senate candidate Graham Platner
Leigh Ann Caldwell • July 15, 2025
Hill Rebellion & The Platner Files
The House rebukes the president on two separate bills, and Maine’s Graham Platner assures senators there isn't worse oppo to come.


Xavier Becerra
Peter Hamby • July 15, 2025
Revenge of the Normie Libs
In California’s primaries, voters mostly chose pragmatism over progressivism: Tom Steyer’s class crusade fizzled, Saikat Chakrabarti got Pelosi’d, L.A. rejected its wannabe Mamdani, and Spencer Pratt—yes, Spencer Pratt—is still in the running.
Jeremy Langmead and Toby Bateman
Lauren Sherman & Malique Morris • July 15, 2025
The Mr Porter Bloodletting & Prada’s Live Strategy
The online retailer laid off several editorial staffers as it and sister site Net-a-Porter continue to shrink. Plus, why Prada's events work.
Stephane de La Faverie
Rachel Strugatz • July 15, 2025
Martial Lauder
Now that ELC’s spring flirtation with Puig is over, investors would very much like it to get back to the long-promised turnaround. But finding buyers for its struggling brands is easier said than done. Plus, why the real narrative on the merger talks just won’t go away.


Jeff Immelt
William D. Cohan • July 15, 2025
The Emancipation of Jeff Immelt
The disgraced-ish former GE executive has been on a journey of personal discovery to reinvent his legacy and perhaps make amends—even when the facts don’t fit his new narrative. But not everyone who worked with him is ready to forgive or forget.


  • Terms
  • Privacy
  • Contact
  • FAQ
  • Careers
© 2026 Heat Media All rights reserved.
Create an account

Already a member? Log In

CREATE AN ACCOUNT with Google
CREATE AN ACCOUNT with Google
OR YOUR EMAIL

OR

Use Email & Password Instead

USE EMAIL & PASSWORD
Password strength:

OR

Use Another Sign-Up Method

Become a member

All of the insider knowledge from our top tier authors, in your inbox.

Create an account

Already a member? Log In

Verify your email!

You should receive a link to log in at .

I DID NOT RECEIVE A LINK

Didn't get an email? Check your spam folder and confirm the spelling of your email, and try again. If you continue to have trouble, reach out to fritz@puck.news.

CREATE AN ACCOUNT with Google
CREATE AN ACCOUNT with Google
CREATE AN ACCOUNT with Apple
CREATE AN ACCOUNT with Apple
OR USE EMAIL & PASSWORD
Password strength:

OR
Log In

Not a member yet? Sign up today

Log in with Google
Log in with Google
Log in with Apple
Log in with Apple
OR USE EMAIL & PASSWORD
Don't have a password or need to reset it?

OR
Verify Account

Verify your email!

You should receive a link to log in at .

I DID NOT RECEIVE A LINK

Didn't get an email? Check your spam folder and confirm the spelling of your email, and try again. If you continue to have trouble, reach out to fritz@puck.news.

YOUR EMAIL

Use a different sign in option instead

Member Exclusive

Get access to this story

Create a free account to preview Puck’s full offering, including exclusive articles, private emails from authors, and more.

Already a member? Sign in

Free article unlocked!

You are logged into a free account as unknown@example.com

ENJOY 1 FREE ARTICLE EACH MONTH

Subscribe today to join the inside conversation at the nexus of Wall Street, Washington, A.I., Hollywood, and more.

START 14-DAY FREE TRIAL

  • Daily articles and breaking news
  • Personal emails directly from our authors
  • Gift subscriber-only stories to friends & family
  • Unlimited access to archives
  • Bookmark articles to create a Reading List
  • Quarterly calls with industry experts from the power corners we cover