Anthropic (AI company)AnthropicAnthropicunder / affiliated withqíxià旗下new AI modelxīn móxíng新模型Mythos (model code name)MythosMythosaccidentallyyìwài意外leaked / disclosedxièlù泄露，cybersecuritywǎngluò ānquán网络安全expertszhuānjiā专家to issue / to raisefāchū发出unprecedentedqián suǒ wèi yǒu前所未有riskfēngxiǎn风险warningjǐnggào警告。
March 27, 2026 at 8:00 PM
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Science & TechnologyAnthropic Accidentally Leaks Powerful New AI Model Mythos, Experts Warn of Unprecedented Cybersecurity Risk
Anthropic accidentally exposed internal documents about its new AI model Mythos through a data storage oversight, revealing unprecedented cybersecurity risks; the news rattled markets and sent cybersecurity stocks lower.
The United States AI company Anthropic experienced an operational error that accidentally exposed an internal draft blog post in a publicly searchable database. About 3,000 files associated with Anthropic's blog were stored unencrypted in this public database, and the information leak originated from this storage oversight.
This document revealed a new AI model with the code name Mythos, described by Anthropic as the most powerful model the company has developed to date. According to leaked content, Mythos significantly surpasses Claude Opus 4.6 across multiple benchmarks including software programming, academic reasoning, and cybersecurity testing.
The document also warned that Mythos currently leads all other AI models in cyber capabilities, potentially facilitating large-scale cyberattacks. Anthropic's spokesperson confirmed the model represents a significant breakthrough in the company's AI performance, though they emphasized that the model is still in early-stage testing and has not yet been released to the public.
The company has privately warned high-level government officials that the Mythos model's release will significantly increase the possibility of large-scale cyberattacks occurring in 2026. Following the news exposure, multiple cybersecurity companies' stock prices immediately declined, and the market expressed heightened concern about AI models potentially being used for hacker attacks.
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