Anthropic has been grifting its highest-paying users, a new class action lawsuit alleges. Filed Monday in the Northern District of California and first reported by the Wall Street Journal, the lawsuit claims that Anthropic has been misleading consumers with its marketing for Claude Max 5x and Max 20x subscription plans. Respectively, the plans cost $100 and $200 per month and are supposed to come with five and twenty times the token allowances as the less expensive Claude Pro subscription. But the plaintiff behind the lawsuit, a Washington D.C.-based user named Karl Kahn, argues the actual limits seem to be much lower, and Anthropic’s pricing model makes it difficult to determine exactly how and where users’ tokens are being spent. The lawsuit claims that Anthropic sent emails to Max 5x and Max 20x subscribers in July of last year outlining the token allowances they could expect every week, and that those were “far below the advertised amount of usage,” according to a quote from the filing included in the Journal’s report. Anthropic did not immediately respond to Gizmodo’s request for comment on the new lawsuit. Costs and complaints Khan’s allegations are the latest in a flurry of complaints against the swelling costs of using frontier AI models. Companies like Amazon and Uber have recently taken steps to limit employees’ use of AI, citing the technology’s price tag, and OpenAI CEO Sam Altman has called the financial burden of AI “a huge issue” facing enterprise customers. The new lawsuit also underscores the complexity that often comes with trying to translate vagaries like tokens and usage windows into concrete monetary values.