Renowned artificial intelligence company Anthropic has recently been involved in a legal lawsuit, with multiple angry Claude users formally filing a lawsuit against the company, accusing it of misleading advertising regarding its top-tier Claude Max subscription plan.

The core dispute of this class-action lawsuit centers on ambiguous descriptions of usage limits for the Max plan. The plan was officially launched in April 2005, offering two tiers at $100 or $200 per month (approximately 672.8 CNY or 1346 CNY based on current exchange rates). According to official promotions at the time, subscribers could receive five or twenty times the usage allowance compared to the standard Pro plan. In contrast, the annual subscription for Claude Pro costs as low as $17 per month (approximately 114.4 CNY), and Anthropic positioned Max as an upgraded option designed for high-intensity users who frequently handle various tasks.

However, the plaintiffs in the lawsuit pointed out that the promised five or twenty times allowance actually applied only to short-term session quotas that reset every five hours, and did not include weekly total quotas. In fact, Max users were also subject to strict weekly usage caps, and this key weekly limitation was not disclosed to users at the time of the plan's launch but was quietly added several months later in August of last year.

Regarding these disputed terms, Monica Vaca, the plaintiff's attorney, stated that the relevant rules were poorly disclosed, and consumers often had to click through obscure links to truly understand the specific calculation methods behind the five or twenty times allowance. Under the opaque black-box mechanism, consumers found it difficult to accurately understand the actual benefits they received. Although Anthropic updated its support page on August 7, 2026, listing related restrictions, this lawsuit has still brought the conflict between large model service providers' commercial pricing and quota transparency to the forefront of public attention.