OpenAI introduces GPT‑5.5‑Cyber for high-impact cybersecurity research

OpenAI Group PBC has developed a version of GPT-5.5 that is specifically optimized for cybersecurity research. GPT‑5.5‑Cyber, as the model is called, made its debut on Thursday. It’s available in limited preview through a program called Trusted Access for Cyber, or TAC, that OpenAI launched in February.