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Anthropic sued for trademark infringement over 'Mythos' model

By Reuters News

By Blake Brittain

Nov 13 (Reuters) - A software company called Mythos sued Anthropic ANT.O in Virginia federal court on Friday, alleging the AI company's use of "Mythos" violates its trademark rights.

  • Mythos, which operates a software platform for nonprofit organizations, told the court that Anthropic's Mythos AI model will create market confusion and cause it "great and irreparable injury"

  • Mythos asked the court for an unspecified amount of monetary damages and a court order blocking Anthropic from using the "Mythos" name

  • Spokespeople for Anthropic did not immediately respond to a request for comment on the complaint

  • Anthropic released its powerful Mythos model in June after addressing US government concerns about potential national security risks

  • Alexandria, Virginia-based Mythos said that it launched its platform in 2015

  • The US Patent and Trademark Office rejected Anthropic's bid to register federal "Claude Mythos" trademarks in October based on likely confusion with Mythos, though that decision is not final

The case is Global Printing Inc d/b/a Mythos v. Anthropic PBC, US District Court for the Eastern District of Virginia, No. 1:26-cv-03756

For Mythos: Adam Hess of Squire Patton Boggs (US)

For Anthropic: attorney information not yet available

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