A paying customer has sued artificial intelligence company Anthropic, alleging that the company’s most expensive Claude subscription plans provide significantly less usage than advertised.
The proposed class-action lawsuit, filed in the U.S. District Court for the Northern District of California and first reported Monday, was brought by Karl Kahn, a Washington, D.C., resident who claims Anthropic’s premium Claude Max 5x and Claude Max 20x plans fail to deliver the usage levels promised in the company’s marketing materials.
Anthropic declined to comment on the litigation, according to reports.
At the center of the dispute is how Anthropic markets access to Claude, its flagship AI chatbot platform.
The company currently offers three primary paid subscription tiers for individual users: a Pro plan priced at roughly $17 to $20 per month, a Max 5x plan costing $100 per month, and a Max 20x plan priced at $200 per month.
As the names suggest, the higher-priced tiers are promoted as providing approximately five times and twenty times the usage of the Pro plan.
The lawsuit argues those claims do not match customers’ real-world experience.
According to the complaint, the Max 20x plan delivers “far less than twenty times” the usage of the Pro tier, allegedly providing closer to six to eight times the available usage. The suit similarly alleges that the Max 5x plan offers roughly three-and-a-half times the usage of the Pro plan rather than the advertised five-fold increase.
The complaint also accuses Anthropic of misleading customers by promoting the $200 plan as providing approximately 50% savings compared with alternative usage options.
Kahn says he initially used Claude’s free tier before upgrading to Pro, then later moving to the Max 5x plan in January and the Max 20x plan in April. According to the filing, he relied heavily on Claude for software-development work and coding projects.
Despite subscribing to the highest-priced plan, Kahn alleges he repeatedly encountered usage limits sooner than expected.
One example cited in the complaint claims a single five-hour coding session consumed approximately 15% of his weekly allotment, forcing him to either stop using the service, reduce his activity, or incur additional charges.
His attorney, Kati Daffan of Vaca Daffan LLP, argues the case centers on traditional consumer-protection principles: customers should receive what companies advertise and sell.
The lawsuit seeks to represent all U.S. customers who purchased a Claude Max subscription since Anthropic introduced the plans.
The case highlights a challenge facing the broader AI industry.
Unlike traditional software subscriptions, AI services do not operate on fixed seat counts or simple usage quotas. Instead, they rely on tokens — small units of text processed by AI models. A brief question may consume very few tokens, while coding projects, lengthy documents, or complex analytical tasks can consume dramatically more computing resources.
That makes it difficult to translate marketing promises such as “5x” or “20x” usage into a predictable experience for every customer.
The lawsuit argues that the gap between those marketing claims and actual usage limits is precisely where consumers are being misled.
Anthropic has faced scrutiny over usage restrictions before.
Last year, the company imposed weekly limits on Claude Code, its AI coding product, after reporting that some users were running the tool continuously and consuming significantly more computing power than anticipated under flat-rate subscription pricing.
Complaints about hitting usage caps sooner than expected have also appeared on online forums, where some users have reported unexpectedly large overage charges after exceeding subscription limits.
The issue extends beyond Anthropic.
As AI models become more powerful and resource-intensive, companies across the industry have increasingly introduced usage caps, throttling systems, and tiered pricing structures. Providers including Google, OpenAI, and Meta have all adjusted pricing, subscription models, or usage limits as they balance customer demand against the enormous costs of operating advanced AI systems.
The timing is notable for Anthropic.
The company is reportedly finalizing a separate class-action settlement related to claims involving training data and copyrighted books, while also being widely viewed as a potential future public-market candidate. A consumer lawsuit challenging its subscription practices adds another layer of scrutiny as investors and regulators increasingly examine the economics of AI businesses.
For now, the allegations remain unproven. Anthropic has not yet responded to the claims in court, and the case remains in its early stages.
JBizNews Desk
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