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Why AI’s ‘vibe shift’ looks like an inflection point

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Good morning. It has been nearly three years since OpenAI’s ChatGPT first made its debut, and its arrival has profoundly reshaped the future of work.

Amid the whirlwind that began in November 2022, my colleague Sharon Goldman assesses our current position in her new Fortune feature article, “We’re not in an ‘AI winter’—but here’s how to survive a cold snap.”

Goldman notes that Gartner forecasts global AI spending will reach nearly $1.5 trillion in 2025 and surpass $2 trillion in 2026, driven by integration into smartphones, PCs, and enterprise infrastructure. Big AI companies, such as OpenAI, Anthropic, Google, and Microsoft, continue to benefit from the AI boom.

However, at the ground level, among customers and in financial markets, there may be an adjustment of expectations. Rowan Curran, principal analyst at Forrester Research, told Goldman that a necessary reset is underway: “Our thermometer was broken before. Now we’re finally getting the correct temperature.” He explained that enterprises are not pulling back from AI, but are recalibrating after a period of overhyped expectations.

Bill Briggs, chief technology officer at Deloitte, acknowledged a “vibe shift” around AI but said it’s not comparable to the late-1990s tech bust: “It’s certainly at an inflection point, but I don’t see this being a repeat of the dotcom bust,” Briggs told Goldman. He emphasized that AI is still driving transformation and that new business models are just beginning.

Goldman writes, “Overall, [Briggs] said, AI is becoming less of a rising star and more of an ambient operator that will quietly influence how organizations think about every process, product, and decision. ‘AI is poised to evolve much like electricity—invisible in our daily lives but powering everything,’ he said.” Perhaps AI’s biggest impact will come from the way it quietly revolutionizes daily life and the workplace.

(You can read Goldman’s complete article here, where she also speaks with experts on how to steer AI investments wisely.)

Over the past year, I have spoken with CFOs about the acceleration of AI in the workplace, including its use for their own tasks. Recently, I talked with Verizon CFO Tony Skiadas about turning AI into a revenue source. Skiadas also shared that he encourages his team to develop innovative AI use cases and explained how he personally uses AI.

“I even use it myself for simple things,” he said. For example, Skiadas uses AI to digest reports and summarize documents: “It’s a time saver for me. And I tell people, if I can use it, anybody can. So that’s my motivation to my team.”

Have a good weekend. See you on Monday.

Sheryl Estrada
sheryl.estrada@fortune.com

Leaderboard

Some notable moves this week:

Joao Laranjo was promoted to CFO of Stellantis N.V. Laranjo succeeds Doug Ostermann, who has resigned from the company for personal reasons. Laranjo rejoined Stellantis earlier this year as CFO of Stellantis North America under the company’s new management. He also previously worked at Goodyear, as well as Fiat Chrysler Automobiles, as chief accounting officer for Latin America, rising to CFO for the region. He began his career at General Electric in 2001, serving as an associate auditor and later as controller for GE Healthcare in South America.

Steve Rai was appointed EVP and CFO of Open Text Corporation (Nasdaq: OTEX), a cloud and AI company, effective Oct. 6. Rai brings over 30 years of experience. He most recently served as CFO of BlackBerry Limited. Before that, Rai held senior finance positions at PMC-Sierra and PricewaterhouseCoopers LLP.

Daniel Sullivan was appointed CFO of Five Below, Inc. (Nasdaq: FIVE), a retail chain. Sullivan has 35 years of experience. He most recently served as EVP and chief operating officer at Edgewell Personal Care, initially joining the company as CFO. Sullivan previously served as CFO of Party City and CFO of Ahold USA, as well as CFO and COO of Heineken USA and Heineken International.

Allison Dorval was appointed CFO of AIRNA, a biotech company. Dorval has more than 25 years of experience. She most recently served as CFO of Verve Therapeutics and played a key role in its acquisition by Eli Lilly. Before Verve, Dorval was CFO of Voyager Therapeutics and held senior finance leadership positions with multiple other biopharma companies.

Amir Jafari was appointed CFO of Couchbase, Inc. (Nasdaq: BASE), a data platform provider, effective immediately. Jafari joins Couchbase from Blend Labs, where he most recently served as CFO and head of finance and operations. Before Blend, he held CFO roles at multiple companies, as well as in finance and product leadership roles at ServiceNow.

Bill Kayser was appointed president and CFO of Iterative Health, a health care technology and services company. Kayser brings over two decades of experience in health care finance, strategy, and leadership, most recently serving as CFO of GI Alliance, an independent gastroenterology practice entity, acquired by Cardinal in 2025. Before GI Alliance, Kayser was CFO of Prospero Health (acquired by Optum) and VP of corporate strategy and M&A at McKesson.

Venkat Ramanan was appointed CFO of Immatics N.V. (Nasdaq: IMTX), a clinical-stage biopharmaceutical company, effective immediately. Ramanan has over 25 years of experience. He joins Immatics from Anthos Therapeutics, a Novartis company, where he served as CFO. He will succeed Immatics’ current CFO, Arnd Christ. Previously, Ramanan was CFO at Turnstone Biologics, where he led the company’s IPO. Earlier, he was SVP of finance at Seagen.

Big Deal

A new report by Boston Consulting Group (BCG), “The Widening AI Value Gap: Build for the Future 2025,” is a global survey of 1,250 senior executives and AI decision makers across nine industries. The study finds the performance gap between AI leaders and laggards is widening fast, primarily driven by the rise of agentic AI. According to BCG, agents already account for 17% of total AI value in 2025, and that share is expected to reach 29% by 2028.

Going deeper

Here are four Fortune weekend reads:

Warren Buffett’s Berkshire Hathaway may have scored a ‘genius’ win-win in $10 billion acquisition that may be the last big deal of his career” by Jordan Blum

Landing on the S&P 500 means a surefire stock boost—and a pleasant surprise for the CEO” by Jeff John Roberts

Inside Ralph Lauren’s luxe reset—and the CEO who made it stick” by Phil Wahba

Jane Goodall made a name for herself with no degree, no experience: She got a job as a waitress and saved ‘every penny’ on a one-way ticket to Africa” by Preston Fore

Overheard

“I would say what I’m most proud of is the team I built, together with [Ford Chair Bill Ford], as well as the foundation.”

—Ford Motor CEO Jim Farley told CNBC this week when marking his fifth year leading the Detroit automaker. Farley has been working to make the company more capital efficient, improve quality to reduce recall and warranty costs, and grow profit margins.



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Senate Dems’ plan to fix Obamacare premiums adds nearly $300 billion to deficit, CRFB says

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The Committee for a Responsible Federal Budget (CRFB) is a nonpartisan watchdog that regularly estimates how much the U.S. Congress is adding to the $38 trillion national debt.

With enhanced Affordable Care Act (ACA) subsidies due to expire within days, some Senate Democrats are scrambling to protect millions of Americans from getting the unpleasant holiday gift of spiking health insurance premiums. The CRFB says there’s just one problem with the plan: It’s not funded.

“With the national debt as large as the economy and interest payments costing $1 trillion annually, it is absurd to suggest adding hundreds of billions more to the debt,” CRFB President Maya MacGuineas wrote in a statement on Friday afternoon.

The proposal, backed by members of the Senate Democratic caucus, would fully extend the enhanced ACA subsidies for three years, from 2026 through 2028, with no additional income limits on who can qualify. Those subsidies, originally boosted during the pandemic and later renewed, were designed to lower premiums and prevent coverage losses for middle‑ and lower‑income households purchasing insurance on the ACA exchanges.

CRFB estimated that even this three‑year extension alone would add roughly $300 billion to federal deficits over the next decade, largely because the federal government would continue to shoulder a larger share of premium costs while enrollment and subsidy amounts remain elevated. If Congress ultimately moves to make the enhanced subsidies permanent—as many advocates have urged—the total cost could swell to nearly $550 billion in additional borrowing over the next decade.

Reversing recent guardrails

MacGuineas called the Senate bill “far worse than even a debt-financed extension” as it would roll back several “program integrity” measures that were enacted as part of a 2025 reconciliation law and were intended to tighten oversight of ACA subsidies. On top of that, it would be funded by borrowing even more. “This is a bad idea made worse,” MacGuineas added.

The watchdog group’s central critique is that the new Senate plan does not attempt to offset its costs through spending cuts or new revenue and, in their view, goes beyond a simple extension by expanding the underlying subsidy structure.

The legislation would permanently repeal restrictions that eliminated subsidies for certain groups enrolling during special enrollment periods and would scrap rules requiring full repayment of excess advance subsidies and stricter verification of eligibility and tax reconciliation. The bill would also nullify portions of a 2025 federal regulation that loosened limits on the actuarial value of exchange plans and altered how subsidies are calculated, effectively reshaping how generous plans can be and how federal support is determined. CRFB warned these reversals would increase costs further while weakening safeguards designed to reduce misuse and error in the subsidy system.

MacGuineas said that any subsidy extension should be paired with broader reforms to curb health spending and reduce overall borrowing. In her view, lawmakers are missing a chance to redesign ACA support in a way that lowers premiums while also improving the long‑term budget outlook.

The debate over ACA subsidies recently contributed to a government funding standoff, and CRFB argued that the new Senate bill reflects a political compromise that prioritizes short‑term relief over long‑term fiscal responsibility.

“After a pointless government shutdown over this issue, it is beyond disappointing that this is the preferred solution to such an important issue,” MacGuineas wrote.

The off-year elections cast the government shutdown and cost-of-living arguments in a different light. Democrats made stunning gains and almost flipped a deep-red district in Tennessee as politicians from the far left and center coalesced around “affordability.”

Senate Minority Leader Chuck Schumer is reportedly smelling blood in the water and doubling down on the theme heading into the pivotal midterm elections of 2026. President Donald Trump is scheduled to visit Pennsylvania soon to discuss pocketbook anxieties. But he is repeating predecessor Joe Biden’s habit of dismissing inflation, despite widespread evidence to the contrary.

“We fixed inflation, and we fixed almost everything,” Trump said in a Tuesday cabinet meeting, in which he also dismissed affordability as a “hoax” pushed by Democrats.​

Lawmakers on both sides of the aisle now face a politically fraught choice: allow premiums to jump sharply—including in swing states like Pennsylvania where ACA enrollees face double‑digit increases—or pass an expensive subsidy extension that would, as CRFB calculates, explode the deficit without addressing underlying health care costs.



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Netflix–Warner Bros. deal sets up $72 billion antitrust test

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Netflix Inc. has won the heated takeover battle for Warner Bros. Discovery Inc. Now it must convince global antitrust regulators that the deal won’t give it an illegal advantage in the streaming market. 

The $72 billion tie-up joins the world’s dominant paid streaming service with one of Hollywood’s most iconic movie studios. It would reshape the market for online video content by combining the No. 1 streaming player with the No. 4 service HBO Max and its blockbuster hits such as Game Of ThronesFriends, and the DC Universe comics characters franchise.  

That could raise red flags for global antitrust regulators over concerns that Netflix would have too much control over the streaming market. The company faces a lengthy Justice Department review and a possible US lawsuit seeking to block the deal if it doesn’t adopt some remedies to get it cleared, analysts said.

“Netflix will have an uphill climb unless it agrees to divest HBO Max as well as additional behavioral commitments — particularly on licensing content,” said Bloomberg Intelligence analyst Jennifer Rie. “The streaming overlap is significant,” she added, saying the argument that “the market should be viewed more broadly is a tough one to win.”

By choosing Netflix, Warner Bros. has jilted another bidder, Paramount Skydance Corp., a move that risks touching off a political battle in Washington. Paramount is backed by the world’s second-richest man, Larry Ellison, and his son, David Ellison, and the company has touted their longstanding close ties to President Donald Trump. Their acquisition of Paramount, which closed in August, has won public praise from Trump. 

Comcast Corp. also made a bid for Warner Bros., looking to merge it with its NBCUniversal division.

The Justice Department’s antitrust division, which would review the transaction in the US, could argue that the deal is illegal on its face because the combined market share would put Netflix well over a 30% threshold.

The White House, the Justice Department and Comcast didn’t immediately respond to requests for comment. 

US lawmakers from both parties, including Republican Representative Darrell Issa and Democratic Senator Elizabeth Warren have already faulted the transaction — which would create a global streaming giant with 450 million users — as harmful to consumers.

“This deal looks like an anti-monopoly nightmare,” Warren said after the Netflix announcement. Utah Senator Mike Lee, a Republican, said in a social media post earlier this week that a Warner Bros.-Netflix tie-up would raise more serious competition questions “than any transaction I’ve seen in about a decade.”

European Union regulators are also likely to subject the Netflix proposal to an intensive review amid pressure from legislators. In the UK, the deal has already drawn scrutiny before the announcement, with House of Lords member Baroness Luciana Berger pressing the government on how the transaction would impact competition and consumer prices.

The combined company could raise prices and broadly impact “culture, film, cinemas and theater releases,”said Andreas Schwab, a leading member of the European Parliament on competition issues, after the announcement.

Paramount has sought to frame the Netflix deal as a non-starter. “The simple truth is that a deal with Netflix as the buyer likely will never close, due to antitrust and regulatory challenges in the United States and in most jurisdictions abroad,” Paramount’s antitrust lawyers wrote to their counterparts at Warner Bros. on Dec. 1.

Appealing directly to Trump could help Netflix avoid intense antitrust scrutiny, New Street Research’s Blair Levin wrote in a note on Friday. Levin said it’s possible that Trump could come to see the benefit of switching from a pro-Paramount position to a pro-Netflix position. “And if he does so, we believe the DOJ will follow suit,” Levin wrote.

Netflix co-Chief Executive Officer Ted Sarandos had dinner with Trump at the president’s Mar-a-Lago resort in Florida last December, a move other CEOs made after the election in order to win over the administration. In a call with investors Friday morning, Sarandos said that he’s “highly confident in the regulatory process,” contending the deal favors consumers, workers and innovation. 

“Our plans here are to work really closely with all the appropriate governments and regulators, but really confident that we’re going to get all the necessary approvals that we need,” he said.

Netflix will likely argue to regulators that other video services such as Google’s YouTube and ByteDance Ltd.’s TikTok should be included in any analysis of the market, which would dramatically shrink the company’s perceived dominance.

The US Federal Communications Commission, which regulates the transfer of broadcast-TV licenses, isn’t expected to play a role in the deal, as neither hold such licenses. Warner Bros. plans to spin off its cable TV division, which includes channels such as CNN, TBS and TNT, before the sale.

Even if antitrust reviews just focus on streaming, Netflix believes it will ultimately prevail, pointing to Amazon.com Inc.’s Prime and Walt Disney Co. as other major competitors, according to people familiar with the company’s thinking. 

Netflix is expected to argue that more than 75% of HBO Max subscribers already subscribe to Netflix, making them complementary offerings rather than competitors, said the people, who asked not to be named discussing confidential deliberations. The company is expected to make the case that reducing its content costs through owning Warner Bros., eliminating redundant back-end technology and bundling Netflix with Max will yield lower prices.



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The rise of AI reasoning models comes with a big energy tradeoff

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Nearly all leading artificial intelligence developers are focused on building AI models that mimic the way humans reason, but new research shows these cutting-edge systems can be far more energy intensive, adding to concerns about AI’s strain on power grids.

AI reasoning models used 30 times more power on average to respond to 1,000 written prompts than alternatives without this reasoning capability or which had it disabled, according to a study released Thursday. The work was carried out by the AI Energy Score project, led by Hugging Face research scientist Sasha Luccioni and Salesforce Inc. head of AI sustainability Boris Gamazaychikov.

The researchers evaluated 40 open, freely available AI models, including software from OpenAI, Alphabet Inc.’s Google and Microsoft Corp. Some models were found to have a much wider disparity in energy consumption, including one from Chinese upstart DeepSeek. A slimmed-down version of DeepSeek’s R1 model used just 50 watt hours to respond to the prompts when reasoning was turned off, or about as much power as is needed to run a 50 watt lightbulb for an hour. With the reasoning feature enabled, the same model required 7,626 watt hours to complete the tasks.

The soaring energy needs of AI have increasingly come under scrutiny. As tech companies race to build more and bigger data centers to support AI, industry watchers have raised concerns about straining power grids and raising energy costs for consumers. A Bloomberg investigation in September found that wholesale electricity prices rose as much as 267% over the past five years in areas near data centers. There are also environmental drawbacks, as Microsoft, Google and Amazon.com Inc. have previously acknowledged the data center buildout could complicate their long-term climate objectives

More than a year ago, OpenAI released its first reasoning model, called o1. Where its prior software replied almost instantly to queries, o1 spent more time computing an answer before responding. Many other AI companies have since released similar systems, with the goal of solving more complex multistep problems for fields like science, math and coding.

Though reasoning systems have quickly become the industry norm for carrying out more complicated tasks, there has been little research into their energy demands. Much of the increase in power consumption is due to reasoning models generating much more text when responding, the researchers said. 

The new report aims to better understand how AI energy needs are evolving, Luccioni said. She also hopes it helps people better understand that there are different types of AI models suited to different actions. Not every query requires tapping the most computationally intensive AI reasoning systems.

“We should be smarter about the way that we use AI,” Luccioni said. “Choosing the right model for the right task is important.”

To test the difference in power use, the researchers ran all the models on the same computer hardware. They used the same prompts for each, ranging from simple questions — such as asking which team won the Super Bowl in a particular year — to more complex math problems. They also used a software tool called CodeCarbon to track how much energy was being consumed in real time.

The results varied considerably. The researchers found one of Microsoft’s Phi 4 reasoning models used 9,462 watt hours with reasoning turned on, compared with about 18 watt hours with it off. OpenAI’s largest gpt-oss model, meanwhile, had a less stark difference. It used 8,504 watt hours with reasoning on the most computationally intensive “high” setting and 5,313 watt hours with the setting turned down to “low.” 

OpenAI, Microsoft, Google and DeepSeek did not immediately respond to a request for comment.

Google released internal research in August that estimated the median text prompt for its Gemini AI service used 0.24 watt-hours of energy, roughly equal to watching TV for less than nine seconds. Google said that figure was “substantially lower than many public estimates.” 

Much of the discussion about AI power consumption has focused on large-scale facilities set up to train artificial intelligence systems. Increasingly, however, tech firms are shifting more resources to inference, or the process of running AI systems after they’ve been trained. The push toward reasoning models is a big piece of that as these systems are more reliant on inference.

Recently, some tech leaders have acknowledged that AI’s power draw needs to be reckoned with. Microsoft CEO Satya Nadella said the industry must earn the “social permission to consume energy” for AI data centers in a November interview. To do that, he argued tech must use AI to do good and foster broad economic growth.



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