GPT-5.5-Cyber is now in limited preview for defenders for securing critical infrastructure.
It's a very capable model.
Today, we're rolling out GPT‑5.5‑Cyber in limited preview to defenders responsible for securing critical infrastructure.
GPT-5.5 with Trusted Access for Cyber (TAC) is still the best option for developers to find and patch vulnerabilities in their code.
It's a very good model.
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