OpenAI to Limit Access to Cyber Tool Following Criticism of Anthropic's Approach

Apr 30, 2026

AI Summary

OpenAI plans to restrict access to its cybersecurity tool, Cyber, initially offering it only to select users. This decision comes after CEO Sam Altman criticized Anthropic for similar practices with its tool, Mythos, raising concerns about potential misuse of such technologies.

OpenAI will roll out its cybersecurity tool, Cyber, to select users identified as critical cyber defenders in the coming days.
Users must submit their credentials and intended use through an application on OpenAI's website to gain access.
Cyber is designed for tasks such as penetration testing, vulnerability identification, and malware reverse engineering.
Altman previously criticized Anthropic's limited access to Mythos as fear-based marketing, while some viewed the rhetoric as exaggerated.
OpenAI is consulting with the U.S. government to expand access to Cyber and identify more legitimate users.

openaicybersecuritygpt-5.5access-restrictionscritical-defenders

OpenAI to Limit Access to Cyber Tool Following Criticism of Anthropic's Approach

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