Mythos AI could be a threat to global cybersecurity

8 MAY 2026

Anthropic has ruled out releasing its latest AI model, Claude Mythos, to the public because of its ability to identify unknown flaws in IT systems.
Those flaws could, theoretically, be exploited by hackers, posing risk to global cybersecurity.
Anthropic confirmed it was investigating a report that a group of people had gained unauthorised access to Mythos.
Anthropic said Mythos could identify and exploit “zero-day” flaws in every important IT operating system and web browser – if a user asked it to do so.
Zero days are so-called because organisations and developers are completely unaware of them and have had no time to patch them before an assailant strikes.

Project Glasswing

Anthropic announced Project Glasswing on 8 April to allow businesses to test Mythos on cybersecurity.
About 40 companies, including Google, JP Morgan, Apple and Goldman SAchs, have been given early access to Mythos to test the AI model as part of their cyber defences.
Anthropic says they will share what they learn “so the whole industry can benefit”.
Ever since the arrival of OpenAI’s ChatGPT in 2022, experts have warned that AI could cause serious real-world damage.