Anthropic Sued Over Claude Max Plans That Deliver Far Less Than Advertised - Startup Fortune

A proposed class action filed against Anthropic in the Northern District of California claims Claude Max subscribers pay for 5x or 20x the usage of the base Pro plan but receive far less. Plaintiff Karl Kahn says internal Anthropic emails and his own account activity point to real multipliers closer to 3.5x and 6-8x, not the numbers in the marketing.

A Claude Max subscriber says Anthropic promised 20 times the usage of its base plan and delivered closer to six.

Karl Kahn paid $200 a month for Anthropic's top-tier Max 20x plan to run Claude Code through long coding sessions. He wanted the usage Anthropic advertised: twenty times what a $20-a-month Pro subscriber gets. What he got, according to a lawsuit he filed against Anthropic, PBC in June, was nowhere close.

Kahn v. Anthropic, PBC, case number 3:26-cv-05763, was filed in the U.S. District Court for the Northern District of California on June 14. It's a proposed class action, seeking to represent every U.S. buyer of the Max 5x or Max 20x plans since Anthropic rolled them out in April 2025. The complaint puts the amount in controversy above $5 million and brings four claims: false advertising, a violation of California's Consumer Legal Remedies Act, negligent misrepresentation, and breach of contract.

The gap is at the center of it. Anthropic markets Max 5x, at $100 a month, as five times the usage of Pro. Max 20x, at $200, is billed as twenty times Pro. According to reporting from Engadget and Qz, the complaint alleges the real multipliers land far lower: roughly 3.5x for Max 5x and somewhere between 6x and 8x for Max 20x. That's not a rounding error. It's the difference between paying for twenty units and getting six.

The complaint leans on internal Anthropic emails from July 2025 that spelled out, tier by tier, what subscribers should expect to use each week. Pro users were told to expect 40 to 80 hours of Sonnet 4 access weekly. The higher tiers promised more. Max 5x subscribers were told 140 to 280 hours of Sonnet 4, plus 15 to 35 hours of Opus 4. Max 20x subscribers got 240 to 480 hours of Sonnet 4, plus 24 to 40 hours of Opus 4. Run the math on the high end of each range, and Max 20x tops out around 520 combined hours against Pro's 80. That's roughly 6.5 times, not 20.

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Kahn's personal experience, described in the filing and reported by letsdatascience.com, is blunter. He says he burned through 15% of his weekly quota in a single five-hour coding session.

Part of what makes the multiplier hard to verify, per the complaint, is that Anthropic doesn't run one limit. It runs two. A rolling five-hour window caps what you can use in any short burst. A separate weekly cycle caps your total across seven days. Reporting indicates the weekly layer was added on top of the five-hour window in late August 2025, after Anthropic found power users running Claude Code close to nonstop.

Stack those two systems and you lose any clean way to check whether your weekly allotment scales the way the price tag implies. You burn through the five-hour window, wait for it to reset, and repeat. There's no visibility into how that maps back to the weekly promise Anthropic emailed you in July. The complaint argues that opacity isn't incidental. It's the mechanism that let the gap between advertised and real usage go unnoticed for over a year.

Anthropic has declined to comment on the lawsuit, according to every outlet that has asked, including Engadget and Yahoo Finance. The case remains active in the Northern District of California. No ruling yet. No settlement either.

A pricing model other AI companies are watching

Anthropic isn't alone in using usage multipliers to sell higher subscription tiers instead of flat token limits. OpenAI, Google, and other AI vendors have built similar tiered structures for their own coding and chat assistants, betting that most subscribers never audit their actual weekly consumption against the marketing math. Kahn's suit tests whether that bet is legally safe. If a federal court in California finds that Anthropic's emailed usage estimates amounted to a promise it didn't keep, other companies selling 5x or 10x usage upgrades will have reason to rewrite those numbers before a subscriber does the math for them.

For now, nothing about Claude Max's pricing has changed. The $100 and $200 tiers are still live, still promising 5x and 20x. Whether that number survives the lawsuit is the open question, and it's the one Anthropic still won't answer.

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