Anthropic faces a class-action lawsuit alleging it misled customers about its Claude Max subscription plans. The suit, filed by Karl Kahn, claims the $100/month Max 5x and $200/month Max 20x tiers provided less AI usage than advertised due to unclear limits. The case highlights the economic challenge of pricing AI services, where heavy users can incur high compute costs for providers.
Class action lawsuit allegations
- ▪A class-action lawsuit was filed against Anthropic on June 14 in the U.S. District Court for the Northern District of California
- ▪The plaintiff, Karl Kahn, alleges he overpaid for the Max 5x and Max 20x subscriptions and received less usage than advertised
- ▪The lawsuit alleges Anthropic misled customers about usage included in its premium Claude Max subscription plans
- ▪The lawsuit seeks damages, restitution, and class certification for U.S. residents who subscribed to Max plans since April 9, 2025
- ▪Kati Daffan, a lawyer for the plaintiff, stated that consumer protection laws require companies to be honest in their advertising
Claude Max subscription tiers
- ▪Plaintiff Karl Kahn claims a single five-hour session on the Max 20x plan consumed 15% of his weekly quota
- ▪Anthropic's Max 5x plan costs $100 per month and is marketed as providing five times the usage of its $20/month Pro plan
Usage transparency concerns
- ▪The complaint alleges Anthropic did not clearly explain how usage was measured, making it difficult for users to verify they received the promised service
- ▪The suit claims Anthropic used hidden caps, including five-hour rolling windows and a separate weekly limit, that throttled heavy work
- ▪Anthropic added weekly usage caps in late August 2025, stating the change would affect fewer than 5% of subscribers
Broader AI subscription market
- ▪Each user interaction with an AI model incurs operational costs for computing resources, unlike traditional software subscriptions
- ▪Heavy users on Anthropic’s $200/month plan can reportedly consume between $600 and $1,500 worth of compute resources
Claude Fable 5 rollout
- ▪The lawsuit follows the recent launch of Anthropic's advanced AI models, Claude Fable 5 and Claude Mythos 5
- ▪The Fable 5 model drew user criticism for consuming subscription allowances more quickly than previous models
Government access suspension
- ▪The government cited national security concerns related to a potential jailbreak vulnerability as the reason for the suspension
- ▪The U.S. government ordered Anthropic to suspend access to Fable 5 and Mythos 5 for foreign nationals
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