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Claude Mythos AI unauthorised access claim probed by Anthropic

bbc.com

April 22, 2026

3 min read

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Summary

Anthropic is investigating a claim of unauthorized access to its Claude Mythos AI tool, which is described as too powerful for public release. The investigation was prompted by a report indicating that a small group accessed the tool through a third-party vendor environment.

Key Takeaways

Anthropic is investigating unauthorized access claims related to its Claude Mythos AI tool, which is considered too powerful for public release.
Access to the Mythos model was reportedly gained through misuse of permissions rather than a traditional hacking incident.
The UK's National Cyber Security Centre emphasizes the potential of advanced AI tools to improve security, while also warning about the risks of unauthorized access leading to malicious activities.
The UK relies on foreign companies like Anthropic for access to advanced AI models, raising concerns about control over their development and deployment.

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