OpenAI will begin rolling out its competing cybersecurity tool, GPT-5.5 Cyber, to critical cyber defenders in the next few days.
The tool can perform tasks such as penetration testing, vulnerability identification and exploitation, and malware reverse engineering.
Access is restricted through OpenAI's Trusted Access for Cyber (TAC) program, which has scaled to thousands of verified defenders and hundreds of teams responsible for protecting critical software.
Critical defenders with legitimate defensive use cases can apply to access dedicated more cyber-permissive models like GPT 5.4-Cyber and the forthcoming GPT 5.5-Cyber through the program.