Anthropic's Claude Max '20x' plan delivers ~6x usage, lawsuit emails suggest
A viral r/singularity post: Anthropic's internal emails, quoted in the class action, show Claude Max 20x delivers ~6x usage of Pro — not 20x. Max 5x: ~3.5x.
Vlad Makarovreviewed and published
A viral r/singularity post on September 1 resurfaced the June lawsuit against Anthropic with a sharper claim than the original coverage: internal emails quoted in the complaint suggest the Claude Max 20x plan, marketed as twenty times the usage of the Pro tier, actually delivers roughly six times as much. The post by u/Myredditaccount0, roughly 400 points and more than 60 comments, is an image: a table compiled from Anthropic's own July 2025 emails, as quoted in the lawsuit. The arithmetic has spread because anyone can check it.
What the Emails Show
The underlying case is Kahn v. Anthropic, PBC (3:26-cv-05763), a proposed class action filed June 14 in the Northern District of California on behalf of every U.S. buyer of the Max 5x ($100/month) and Max 20x ($200/month) tiers since they launched in April 2025. Karl Kahn, a Washington, D.C.-based Claude Code user, alleges false advertising, violations of the California Consumer Legal Remedies Act, negligent misrepresentation, and breach of contract, with more than $5 million in controversy. The WSJ covered the filing in June; Anthropic declined to comment, per Engadget.
The numbers circulating this week come from the plaintiff's reading of Anthropic's July 2025 internal emails, quoted in the complaint:
| Plan | Weekly Sonnet 4 hours | Multiple vs Pro |
|---|---|---|
| Pro | 40-80 | 1x |
| Max 5x | 140-280 | ~3.5x |
| Max 20x | 240-480 | ~6x |
If the marketing multipliers held, the 5x tier would mean 200-400 hours and the 20x tier 800-1,600. The emails imply Max 5x delivers about 3.5x Pro, and Max 20x about 6x Pro — 1.7x over Max 5x, not four times. Add the Opus 4 allowances (15-35 hours on 5x, 24-40 on 20x) and the high end lands near 520 hours against Pro's 80: about 6.5x, still a third of the advertised figure.
Two Limits, Neither Transparent
Kahn says one five-hour session burned 15 percent of his weekly quota. The opacity argument is structural: a rolling five-hour window and a weekly cap, the latter added in late August 2025 after power users left Claude Code running nonstop, stack in ways the marketing never documents. Both plans remain on sale.
Why the Math Matters
Anthropic is not alone in selling multiplier tiers — OpenAI, Google and others market similar usage multiples — which is why this arithmetic resonates beyond one lawsuit. If the case survives discovery, it could force the first public accounting of what those labels actually buy. What would settle the argument: the emails in full, a published quota table, or a court order compelling one. Until then, "20x" is a marketing number with the company's own documents on the other side of the scale.
