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Karl Kahn, a resident of Washington, D.C., recently filed a lawsuit against Anthropic in the United States District Court for the Northern District of California. He seeks class-action status for this legal action. The suit represents all American users who purchased Claude Max subscriptions since April 2025. This group includes both the 5x and 20x tier subscribers seeking damages.
Misleading Claude Max Limits
The plaintiff alleges that Claude Max usage limits involve deceptive advertising. The lawsuit details that the $100 monthly Claude Max 5x plan promises five times the usage of Claude Pro. However, it actually delivers a mere 3.5 times the capacity. Similarly, the $200 Claude Max 20x plan advertises twenty times the capacity. Yet, it only provides a six-fold increase in reality.
Furthermore, actual quota calculations reveal a stark discrepancy. The 20x plan offers only 1.7 times the quota of the 5x plan. This sharply contradicts Anthropic’s advertised four-fold difference. Moreover, the plaintiff accuses Anthropic of utilizing opaque calculation methods. This lack of transparency makes it incredibly difficult for consumers to estimate their actual usage.
Kahn claims that after upgrading, a single five-hour coding session consumed 15% of his weekly allowance. Consequently, he was forced to abruptly halt his work. He then had to ration his remaining usage or purchase additional credits.
Developers Echo Frustrations
Many developers share similar frustrating experiences. Claude Max represents Anthropic’s premium subscription tier for heavy users. Its pricing significantly exceeds the standard Claude Pro plan. Meanwhile, Anthropic aggressively promotes the 5x and 20x usage multipliers via email and its website. This strategy aims to entice developers into upgrading to these expensive tiers.
However, numerous developers echo Kahn’s sentiments during real-world application. A glaring disparity exists between the advertised multipliers and the actual dynamic throttling mechanisms. Many heavy users find the AI subscription quota calculations overly complex. Sudden rate limits frequently undermine the value of these premium plans. Ultimately, most users struggle to intuitively calculate their actual usage.
Pending Class-Action Status
Currently, Anthropic has not issued a public response regarding this litigation. Because the filing is recent, the federal court must still review the Kahn v. Anthropic PBC case. Therefore, the class-action status remains unconfirmed. If the court eventually grants this status, Anthropic could face massive financial compensation payouts to affected users.
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