A group of Claude subscribers has filed an expanded class action lawsuit against Anthropic, alleging the company deceptively advertised the usage limits of its premium Max subscription tier. The suit, brought by attorneys Monica Vaca and Kati Daffan, both former Federal Trade Commission officials under Lina Khan, represents one of the few attempts to hold an AI company legally accountable over pricing complaints amid growing frustration across the industry about rising costs being passed on to users.

Anthropic's Max plan costs $100 or $200 a month, promising "5x" or "20x" the usage limits of the standard $20 Pro plan. The complaint alleges these figures are misleading, since the boosted usage only applies within five-hour windows that are also subject to a separate weekly cap, significantly reducing the real-terms increase, with the relevant terms buried behind multiple hyperlinks. Anthropic introduced the weekly limits in August 2025, months after launching Max, and previously argued in a motion to dismiss an earlier version of the case that the information was accessible to anyone who sought it out. Anthropic did not respond to a request for comment on the new filing.