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Anthropic Confirms Claude Mythos-Class Models Will Roll Out to the Public

Anthropic said the models will reach all customers after earlier security concerns delayed a broader launch.

  • Anthropic confirmed Thursday that it plans to release Mythos-class models to all customers in the coming weeks after making "swift progress" on developing "stronger safety safeguards."
  • The company previously limited access to Mythos via Project Glasswing, citing major "security" risks and fearing the model's capabilities could be exploited to find vulnerabilities in critical systems.
  • Alongside this, Anthropic released an upgraded Claude Opus described as a "modest but tangible improvement," though researchers note Mythos remains 30 times as expensive to run as previous models.
  • Darren Williams, founder and CEO of cybersecurity firm BlackFog, said staging the release showed "right instincts," while Jake Williams of IANS Research noted Mythos's high cost limits utility to nation-state actors.
  • Anthropic also plans to expand Project Glasswing with government partners on Friday while Bloomberg News reported the company is discussing going public as soon as this fall amid a valuation exceeding $900 billion.
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Reuters broke the news in New York, United States on Thursday, May 28, 2026.
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