We’re entering a new era for cybersecurity. We’ll be working closely with our partners and the broader security community to ensure these capabilities reach defenders everywhere.
Using Codex on your phone feels so magical!
Starting a session at your computer and continuing it while in meetings or on the go (my number of walking meetings has risen dramatically!) - it really feels like you're living in the future.
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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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