Tuesday, April 21, 2026

Anthropic’s Mythos AI model accessed by unauthorised users, Bloomberg News reports

Bengaluru – A small group of unauthorised users has accessed Anthropic’s new Mythos AI model, Bloomberg News reported on April 22, 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 unauthorised 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 organisations 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. REUTERS

Source : https://www.straitstimes.com/business/companies-markets/anthropics-mythos-ai-model-accessed-by-unauthorised-users-bloomberg-news-reports

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