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Microsoft Wins Partial Dismissal of ChatGPT Users’ Antitrust Case

By  |  September 29, 2026
Microsoft Wins Partial Dismissal of ChatGPT Users’ Antitrust Case

Microsoft Corp. won a partial victory in a proposed class action brought by ChatGPT subscribers after a federal judge dismissed an antitrust claim alleging that the technology company’s relationship with OpenAI harmed competition and contributed to higher prices.

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    US District Judge P. Casey Pitts in California dismissed the subscribers’ antitrust claim while allowing them an opportunity to amend their allegations, according to Law360. The judge, however, rejected Microsoft’s attempt to send the dispute to arbitration, leaving portions of the litigation in federal court.

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    The case centers on allegations that Microsoft used its commercial relationship with OpenAI to constrain the artificial-intelligence company’s access to computing infrastructure. The plaintiffs contend that arrangements between the companies restricted OpenAI’s output and imposed a price floor on ChatGPT products, according to Law360 and related coverage of the litigation.

    Read more: AI Copyright Fight Expands as Regional Newspapers Target OpenAI, Microsoft

    Pitts concluded that the subscribers had not adequately shown the type of injury required to sustain their antitrust claim. The plaintiffs are consumers of generative-AI services rather than rival cloud-computing suppliers allegedly prevented from selling capacity to OpenAI or competing AI providers allegedly denied access to computing resources, according to a summary of the ruling reported by MLex and Law360.

    Source: Law360