The world’s fifth wealthiest man started buying properties in the 400-resident town of Manalapan, Fla. in 2022, and since then has pumped $450 million into two landmark properties, Bloomberg reported. Ellison set a Florida record for the purchase of a $173 million estate spanning 16-acres that includes both beachfront and lakefront property. And in August 2024, he paid $277 million for the town’s biggest structure, a 300-plus room hotel, the Eau Palm Beach Resort & Spa, according to Bloomberg.

The hotel stands on the grounds of the original La Coquille Club, which in the 1950’s reportedly hosted the Duke and Duchess of Windsor as well as members of the Ford and Vanderbilt families. In the ’80s the original club was razed, but it still exists in name and is part of what is now the Eau Palm Beach hotel. Manalapan property owners can become members of the beach club without paying initiation fees or annual dues, according to the Town of Manalapan’s website.

For years, the ultra-rich have increasingly homed in on Florida properties. Amazon founder Jeff Bezos has bought three properties on the Florida island Indian Creek, near Miami. Ken Griffin, the founder and CEO of investment firm Citadel, has also spent an estimated $450 million over the years amassing a 25-acre spread in Palm Beach.

In Manalapan, several beachfront homes along the same road as Ellison’s property have sold for tens of millions of dollars, according to Zillow. Yet, Manalapan’s mayor John Deese told Fortune that the recent high-price purchases as well as Ellison’s investments in the town are more than welcome.

“Manalapan has for many years been one of the highest ranked communities in terms of home sales prices in the United States. The recent sales have just added to the overall success of the real estate market in south Florida. We feel very fortunate that Mr. Ellison and others chose Manalapan for their residential and commercial property investments,” Deese said in an email.

Ellison’s purchase of the Eau Palm Beach hotel now serves as a prime attraction for high-net-worth potential buyers. Stewart Satter, the local developer of a recently listed $285 million mansion adjacent to Ellison’s property in Manalapan, said Ellison’s plans for the hotel could become a focal point of the area.

“The hotel has the potential to be an extraordinary property in the town,” Satter told Bloomberg. “And Ellison certainly has a reputation for operating some beautiful resorts.”

Ellison purchased the majority of the Hawaiian island of Lanai in 2012 for an estimated $300 million, and through his company, Pulama Lanai, has remodeled the island’s two Four Seasons resort hotels, and received praise for new, ultra-luxe touches. Among the additions debuted in 2016 at the Four Seasons Resort Lanai were a $21,000 per night “Alii Royal Suite,” as well as grotto-style pools and iPad Air devices in every room to order room service and housekeeping, among other amenities, according to SFGate.

At the Eau Palm Beach Resort & Spa, Ellison has also promised renovations and has installed a pop-up Nobu restaurant on-site, Bloomberg reported. Nobu appears to be a favorite of Ellison’s. He and Tesla CEO Elon Musk brought Nvidia CEO Jensen Huang there last year to beg him for more GPUs. Ellison said he picked up the tab. 

Another draw of Manalapan and the surrounding areas is the proximity to Mar-a-Lago, President Trump’s “Winter White House,” where he often spends weekends, according to Palm Beach County Commissioner Maria Sachs. 

“Every place in that area is having a moment because of Donald Trump,” Sachs told Bloomberg. “You are so close to Mar-a-Lago, you can get a membership and everyone knows that he’s very public there.”

A version of this story originally published on Fortune.com on March 21, 2025.

More on real estate:

• In a frozen luxury housing market, buyers are asking to ‘try before they buy’ and having sleepovers in multimillion-dollar mansions
• Gen Z is defiantly ‘giving up’ on ever owning a home and is spending more than saving, working less, and making risky investments, study shows
• A ‘new era’ in the housing market is about to begin as affordability finally improves ‘for the first time in a bunch of years,’ economist says

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Writing rules to govern the use of AI-generated content is relatively easy. Enforcing them depends on something much harder: reliably detecting whether a piece of text was generated by artificial intelligence.

Some studies have investigated whether humans can detect AI-generated text. For example, people who themselves use AI writing tools heavily have been shown to accurately detect AI-written text. A panel of human evaluators can even outperform automated tools in a controlled setting. However, such expertise is not widespread, and individual judgment can be inconsistent. Institutions that need consistency at a large scale therefore turn to automated AI text detectors.

The problem of AI text detection

The basic workflow behind AI text detection is easy to describe. Start with a piece of text whose origin you want to determine. Then apply a detection tool, often an AI system itself, that analyzes the text and produces a score, usually expressed as a probability, indicating how likely the text is to have been AI-generated. Use the score to inform downstream decisions, such as whether to impose a penalty for violating a rule.

This simple description, however, hides a great deal of complexity. It glosses over a number of background assumptions that need to be made explicit. Do you know which AI tools might have plausibly been used to generate the text? What kind of access do you have to these tools? Can you run them yourself, or inspect their inner workings? How much text do you have? Do you have a single text or a collection of writings gathered over time? What AI detection tools can and cannot tell you depends critically on the answers to questions like these.

There is one additional detail that is especially important: Did the AI system that generated the text deliberately embed markers to make later detection easier?

These indicators are known as watermarks. Watermarked text looks like ordinary text, but the markers are embedded in subtle ways that do not reveal themselves to casual inspection. Someone with the right key can later check for the presence of these markers and verify that the text came from a watermarked AI-generated source. This approach, however, relies on cooperation from AI vendors and is not always available.

How AI text detection tools work

One obvious approach is to use AI itself to detect AI-written text. The idea is straightforward. Start by collecting a large corpus, meaning collection of writing, of examples labeled as human-written or AI-generated, then train a model to distinguish between the two. In effect, AI text detection is treated as a standard classification problem, similar in spirit to spam filtering. Once trained, the detector examines new text and predicts whether it more closely resembles the AI-generated examples or the human-written ones it has seen before.

The learned-detector approach can work even if you know little about which AI tools might have generated the text. The main requirement is that the training corpus be diverse enough to include outputs from a wide range of AI systems.

But if you do have access to the AI tools you are concerned about, a different approach becomes possible. This second strategy does not rely on collecting large labeled datasets or training a separate detector. Instead, it looks for statistical signals in the text, often in relation to how specific AI models generate language, to assess whether the text is likely to be AI-generated. For example, some methods examine the probability that an AI model assigns to a piece of text. If the model assigns an unusually high probability to the exact sequence of words, this can be a signal that the text was, in fact, generated by that model.

Finally, in the case of text that is generated by an AI system that embeds a watermark, the problem shifts from detection to verification. Using a secret key provided by the AI vendor, a verification tool can assess whether the text is consistent with having been generated by a watermarked system. This approach relies on information that is not available from the text alone, rather than on inferences drawn from the text itself. https://www.youtube.com/embed/oUgfQAaRL6Y?wmode=transparent&start=0 AI engineer Tom Dekan demonstrates how easily commercial AI text detectors can be defeated.

Limitations of detection tools

Each family of tools comes with its own limitations, making it difficult to declare a clear winner. Learning-based detectors, for example, are sensitive to how closely new text resembles the data they were trained on. Their accuracy drops when the text differs substantially from the training corpus, which can quickly become outdated as new AI models are released. Continually curating fresh data and retraining detectors is costly, and detectors inevitably lag behind the systems they are meant to identify.

Statistical tests face a different set of constraints. Many rely on assumptions about how specific AI models generate text, or on access to those models’ probability distributions. When models are proprietary, frequently updated or simply unknown, these assumptions break down. As a result, methods that work well in controlled settings can become unreliable or inapplicable in the real world.

Watermarking shifts the problem from detection to verification, but it introduces its own dependencies. It relies on cooperation from AI vendors and applies only to text generated with watermarking enabled.

More broadly, AI text detection is part of an escalating arms race. Detection tools must be publicly available to be useful, but that same transparency enables evasion. As AI text generators grow more capable and evasion techniques more sophisticated, detectors are unlikely to gain a lasting upper hand.

Hard reality

The problem of AI text detection is simple to state but hard to solve reliably. Institutions with rules governing the use of AI-written text cannot rely on detection tools alone for enforcement.

As society adapts to generative AI, we are likely to refine norms around acceptable use of AI-generated text and improve detection techniques. But ultimately, we’ll have to learn to live with the fact that such tools will never be perfect.

Ambuj Tewari, Professor of Statistics, University of Michigan

This article is republished from The Conversation under a Creative Commons license. Read the original article.

But the higher volume will also undoubtedly present a challenge to financial institutions, if they are bound by legacy technology. Too much of the mortgage technology still used by many banks and other lending institutions isn’t designed to keep up with increased demand. Nor are these outmoded systems able to improve profit margins for lenders. A recent Freddie Mac study indicated that as recently as this summer, mortgages still regularly cost, on average, more than $11,500 for a lender to originate. 

And so, the mortgage market is ripe for innovation. Salesforce supports banks and lenders by helping them bring together customer data including borrower profiles, loan details, and interactions, with AI built in to help teams work more efficiently and better support borrowers.

In conversations with our mortgage customers and industry leaders, we’re seeing growing interest in AI agents — autonomous systems that can take action on tasks. This agentic approach will empower lenders to rethink the entire mortgage process, turning the loan lifecycle from a slow, paper-intensive gauntlet into a streamlined digital journey. Embracing AI agents can also redefine the entire value chain, from property valuation and listing to lending and long-term asset management.

As someone who served as an executive in the Federal Housing Administration within the U.S. Department of Housing and Urban Development (HUD) during the aftermath of the 2008 financial crisis, I now often wonder if aspects of that mortgage-based calamity could have been mitigated if the industry had access to agentic AI in the functional areas of quality control and risk and fraud management back then.

Today, agentic AI offers a level of visibility that simply didn’t exist back then—providing the real-time insights that allow lenders to better support borrowers and ensure they are in the best possible financial position from the start.

Agentic applications

There are many banking and lending benefits to agentic AI.

Let’s start with one of the most basic — automation. A significant portion of lending involves rote tasks which account for a significant portion of the mortgage process, including the collection and assimilation of data such as bank statements, pay stubs, and property details. Agentic AI can automate this work drastically reducing the time it takes to process and underwrite a loan. This efficiency drives down the cost of originating a loan, a critical metric for any lender.

Another benefit comes in proactive risk management. Agentic AI excels in this area by providing automated underwriting and sophisticated risk modeling to catch potential issues early in the lending process. By analyzing vast amounts of borrower data and property values in real time, AI systems can spot patterns, flag anomalies (such as undisclosed payments on a bank statement), and make informed lending decisions faster than traditional and manual methods. This technological capability not only protects the lending institution but also imbues a sense of urgency that helps keep things moving. 

The impact of AI, of course, extends beyond the lending back office and into the heart of the property transaction itself, transforming how assets are valued, marketed, and managed. The traditional slow and often subjective property appraisal process is being revolutionized by AI-driven automated valuation models (AVMs). These use machine learning to analyze thousands of data points in seconds, drawing from MLS records, tax rolls, deeds, and unstructured data such as property photos and listing descriptions. 

For real estate professionals, AI-powered systems can generate high-quality and engaging listing descriptions, optimizing them for search visibility and providing personalized property recommendations to buyers by analyzing buyer preferences and behavior.

There’s a customer service aspect to AI, as well. Many inbound customer inquiries come through lenders’ websites. Yet, if the responses depend entirely on overworked human customer service agents, many of these leads go unanswered. By managing and rerouting these inquiries with agentic AI, organizations can ensure that no potential customer is ignored. 

Customers for life

The real business opportunity with agentic AI in the lending industry comes in the area of intelligent indexing, or what some might call the “contextual cross-sell/upsell.” This begins with the mortgage application and incorporates other data into a golden record of customer experience. 

Consider all the disparate data about a customer that a full-service financial institution has about a customer. A cloud-based AI platform that aggregates all this information and makes it accessible to AI agents can digest data and proactively recommend products or opportunities to expand that customer’s relationship with the lender.

In some cases, this might mean recommending a customer toward another mortgage product such as a home equity line of credit. In others, it might mean suggesting to that customer an entirely different financial endeavor such as a 529 account if a young family wants to start saving for their children’s college tuition, or a life insurance product to ensure a family is protected in times of crisis. 

This proactive service transforms loan officers from paperwork processors into financial-service concierges — professionals who are focused on strategic relationship-building and turning mortgage applicants into customers for life.

Rising to the Challenge

Of course, the agentic AI era is not without potential pitfalls – particularly in a regulated industry like housing

The first challenge: Overcoming the spectre of bias. The use of AI in lending decisions, AVMs, and tenant screening must be subject to rigorous guardrails to prevent discrimination and the perpetuation of historical biases embedded in training data. 

Lenders must be able to explain how AI models arrived at a decision, a key regulatory piece known as explainability. This concept dictates that AI serves primarily in an assistive capacity, ensuring that a human remains in the loop for critical decisions like final underwriting, where judgment and empathy are irreplaceable.

If mortgage lending companies implement agentic AI across the organization — to become truly agentic enterprises — the industry could become one of the most effective AI use cases in the marketplace today. Housing and its related financial activities are ripe to become an agentic industry — an efficient, integrated, and predictive ecosystem where the intelligent use of data creates certainty for borrowers and a competitive advantage for businesses. 

Agentic AI technology – in conjunction with skilled humans in the loop – provides a transformative opportunity. Forward-thinking lending institutions will be brave enough to seize it.

The opinions expressed in Fortune.com commentary pieces are solely the views of their authors and do not necessarily reflect the opinions and beliefs of Fortune.