After dissing Anthropic for limiting Mythos, OpenAI restricts access to Cyber, too

OpenAI is restricting access to its new cybersecurity tool called Cyber (part of GPT-5.5) to only approved users, requiring them to submit credentials and explain their intended use through an application on OpenAI's website. Cyber can perform tasks like penetration testing (simulating attacks to find security weaknesses), vulnerability identification, and malware reverse engineering (analyzing malicious code to understand how it works), but OpenAI is limiting access because the tool could be misused by attackers if widely available.