A new class-action lawsuit accuses Anthropic of misleading advertising for its top-tier Claude Max plan. The suit, filed on September 8, claims that the "5x or 20x more usage" marketing is vague and fails to disclose that these multipliers apply only to a daily session window, not weekly usage. Users have expressed confusion on Reddit, with one commenter noting they thought they were getting 20x weekly usage.

The lawsuit follows a similar federal case from June. Attorney Monica Vaca argues the terms are unclear, requiring users to click multiple hyperlinks to understand the true limits. Anthropic had not responded to Engadget's request for comment at publication time.