Anthropic will have to answer allegations of misleading advertising related to Claude Max plans, after a ruling by the federal court in California issued on Friday (6). The lawsuit questions the promise of offering up to 20 times more usage than Claude Pro, although the service's weekly limits do not match that proportion.
Judge Alex Tse considered it plausible that consumers would interpret the advertising as a guarantee of additional capacity throughout the entire month. In practice, the multipliers advertised by Anthropic apply to five-hour sessions, while subscribers are also subject to separate weekly limits.
The plans in question cost US$ 100 per month in the Max 5x tier and US$ 200 for Max 20x, compared with US$ 17 to US$ 20 for Claude Pro.
Claude pricing page on May 29, 2026, with the promise of 5x or 20x more usage than Pro. Reproduction: Anthropic / UsagePricing.
According to calculations presented by the plaintiffs and cited in the ruling, the weekly limits for the Claude Sonnet 4 model amount to only 3.5 times Pro's capacity on Max 5x and six times on Max 20x. These numbers refer specifically to the analyzed model, not to a universal ratio for all Claude models.
Weekly limits can run out sooner than expected
The difference between per-session and weekly limits allows for an apparently contradictory situation: a Max 20x subscriber can exhaust their weekly allowance before another Max 5x user, depending on usage intensity.
The ruling cites a consumer report who had used half of their weekly Max 20x allowance by the third day. Another section of the lawsuit states that fully using a single five-hour session could consume approximately 15% of the available weekly capacity.
In its defense, Anthropic argued that the restrictions were stated on its website and that consumers should understand the multipliers as referring to each session.
The judge, however, noted that the explanation of how this works was two links away from the main subscription pages. The notice displayed directly on the commercial page stated only that there were usage limits, without clarifying that the multipliers were restricted to sessions.
For Tse, because subscriptions are billed monthly, it is reasonable for consumers to understand the promise of five or 20 times more usage as a comparison referring to the entire month.
The ruling allows the allegations of negligent misrepresentation, breach of contract and a claim based on California consumer protection law to proceed. Other claims were rejected at this stage, with the possibility of filing an amended petition.
In November 2026, Anthropic replaced the old Max 20x with Ultra, keeping the price at US$ 200 per month. In the current offering, Ultra advertises ten times Pro's weekly capacity and waives the five-hour limit for verified accounts. The US$ 100 Max is presented with five times Pro's capacity per session and per week. This restructuring postdates the advertising discussed in the lawsuit.
Claude benefits table captured on November 9, 2026, after the replacement of Max 20x with Ultra. Reproduction: Anthropic / UsagePricing.
The ruling does not establish that Anthropic engaged in misleading advertising, but it determines that some of the allegations have sufficient basis to continue being examined in court.
The plaintiffs have until December 2, 2026 to submit amendments to the petition. If they do not, Anthropic must respond to the current version by December 16.
According to Reuters, the company and its lawyers did not immediately respond to requests for comment on the ruling.
Slug: `anthropic-claude-max-deceptive-advertising-lawsuit`
Excerpt: Calculations presented to the court indicate that the former US$ 200 Claude Max offered six times Pro's weekly limit on Sonnet 4, despite the advertising promise of 20 times more usage.
Meta Title: Anthropic faces lawsuit over Claude Max 20x advertising
Meta Description: US court allows lawsuit against Anthropic over Claude Max ads. Sonnet 4 weekly limits fall below the promised multipliers.
