California Gas Stations Sued for AI Price-Fixing Algorithm

Federal lawsuit targets AI-driven fuel pricing

A federal lawsuit filed in Sacramento accuses major gas station operators of using artificial intelligence to coordinate price increases across California, where fuel already costs more than anywhere else in the United States. The complaint, first reported by Bloomberg, targets Kalibrate Fuel Pricing software and the chains that allegedly deployed it.

The Monday filing names 1,732 stations operated by household names including Walmart, Circle K, Speedway, ARCO, and Albertsons. According to the plaintiffs, these retailers fed cost and volume data into Kalibrate's system, which then made pricing recommendations that effectively eliminated competition and drove prices higher.

How the algorithm allegedly worked

The lawsuit describes a system where participating gas stations surrendered pricing autonomy to Kalibrate's parent company, Knowledge Support Systems. By pooling operational data from competitors, the software could identify opportunities for synchronized price increases.

A feature called "restoration" stands at the center of the allegations. This tool purportedly allowed most stations in a given market to implement large price hikes simultaneously—a coordination that would be difficult to achieve through traditional competitive behavior.

In markets with heavy Kalibrate adoption, the suit claims prices rose as much as 30 cents per gallon above what competitive market forces would produce. California's average gas price stood at $5.52 per gallon as of the lawsuit's filing date, the highest in the nation according to GasBuddy data.

Why it matters

This case represents one of the first major legal tests of new algorithmic pricing restrictions. As AI-powered pricing tools proliferate across retail sectors, regulators and courts are grappling with how to distinguish legitimate optimization from illegal coordination. The California lawsuit could establish precedent for how pricing algorithms are evaluated under antitrust law—particularly when they involve sharing competitor data. For businesses deploying AI pricing tools, the case signals growing legal risk around systems that use market-wide information to set prices.

Legal foundation in 2025 California law

The plaintiffs brought their case under AB 325, legislation signed in 2025 that specifically prohibits using common pricing algorithms to "restrain trade or commerce." The law reflects California's attempt to address a gray area in antitrust enforcement: when companies use the same third-party software to set prices, are they illegally coordinating even without direct communication?

The complaint argues Kalibrate's algorithm violates AB 325 by using competitor data to "recommend, align, stabilize, set, and influence gasoline prices." This framing suggests the software crossed the line from individual optimization into collective price-setting.

The named defendants include ARCO (1,000 stations), Circle K (400 stations), Speedway (150 stations), EG America (90 stations), Albertsons (51 stations), Walmart and Sam's Club (25 stations), and TravelCenters (16 stations). Kalibrate did not respond to requests for comment.

Bloomberg first obtained and reported details of the lawsuit.