GPT-5.5-Cyber

Inside GPT-5.5-Cyber: Capabilities, Refusals, and Federal Briefings Explained

OpenAI released GPT-5.5-Cyber to select participants in its Trusted Access for Cyber program, a variant fine-tuned for offensive and defensive security workflows. This specialized AI is hardened against system prompt injection and was briefed to federal agencies, covering capabilities like automated vulnerability discovery.