Anthropic's Mythos model accessed by unauthorized users, Bloomberg News reports

April 21 (Reuters) - A ‌small group ​of ​unauthorized users has accessed Anthropic's new Mythos AI model, Bloomberg ‌News reported on Tuesday, citing documentation and ⁠a person familiar with the matter.

A handful of ‌users in a ‌private online forum gained access to Mythos on the same day that Anthropic ​first announced a plan to release the model to a limited number of ⁠companies for testing purposes, the report said.

The group has ​been using Mythos regularly since then, though not for cybersecurity purposes, according ​to the report.

"We're investigating ‌a report claiming unauthorized access to Claude Mythos Preview through one ⁠of our third-party vendor environments," an Anthropic spokesperson said.

Announced on April 7, Mythos is ⁠being deployed as part of Anthropic's "Project Glasswing," a controlled ​initiative under which select organizations are permitted to use the unreleased Claude Mythos Preview model for ‌defensive cybersecurity.

Mythos is a powerful AI model that has sparked ‌concerns among regulators about its unprecedented ability ⁠to identify digital ‌security vulnerabilities and ​potential for misuse.

(Reporting by Zaheer Kachwala in Bengaluru; Editing by Pooja ‌Desai)

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