McDonald's is facing a federal lawsuit alleging its AI-driven pricing tool lets thousands of franchisees share competitive data they'd never share as rivals — and families already stretched thin by inflation are paying the tab.

The suit, filed Friday in Illinois, accuses the burger giant of building what it calls an "information-sharing pricing platform" that draws on millions of daily transactions to set menu prices across thousands of U.S. restaurants. The result, the lawsuit states, is "algorithmic price-fixing aimed at customers who are already stretched thin."

The core allegation: McDonald's AI tool collects store-level sales and other nonpublic data from individual franchisees and makes it available to other franchisees who might be competing in the same market. That kind of data-sharing between competitors is exactly what antitrust law is supposed to prevent. The lawsuit blames the system for raising McDonald's U.S. prices.

McDonald's pushed back hard. "AI does not set menu prices at McDonald's restaurants – McDonald's franchisees do," the company said in a statement, calling the lawsuit "filled with inaccuracies." A spokesman told the Associated Press: "All we do is provide the context of what's going on. We don't have any way to affect the menu pricing in a restaurant."

But the lawsuit says McDonald's has "significant leverage" over its franchisees and can pressure them to follow its pricing recommendations. And the company's own CEO, Chris Kempczinski, admitted on an August investor call that only 60% of U.S. restaurants were offering McDonald's proposed value menu of 10 items under $3. "As you know, in our system, that's not something that we just flip the switch on," Kempczinski said. "It requires conversations with franchisees."

Those conversations matter. Franchisees own and operate 95% of McDonald's 14,000 U.S. stores. McDonald's says the AI tool — which it has used for over a decade — is optional and factors in a store's sales, location, and competitors' prices to recommend an "optimal price." But when corporate holds the lease, the supply chain, and the brand, "optional" carries weight.

The lawsuit was filed on behalf of Michael Thomas of DeKalb, Illinois, who says he frequently orders a Quarter Pounder with cheese, fries, and a Coke — and noticed price differences between stores near his home. It seeks class-action certification and damages, and asks the court to block agreements that restrict competition.

HuffPost noted that McDonald's has been experimenting with value strategies to win back lower-income consumers whose visits have dropped. Yahoo Finance's version of the same story omitted that context entirely — leaving readers with the corporate defense and no sense of who's getting squeezed.

McDonald's has used this tool for over a decade. The question now is whether a court will treat algorithmic coordination the same as a smoke-filled room — and whether the franchisees who set the prices, or the corporation that feeds them the data, will pay if it does.