**[OpenAI Launches GPT-5.5-Cyber and Introduces Trusted Access for Cyber Framework]** Odaily Planet Daily News: OpenAI has officially launched the GPT-5.5-Cyber model along with the "Trusted Access for Cyber" (TAC) framework aimed at cybersecurity defenders. Additionally, GPT-5.5-Cyber is now available in limited preview to defenders responsible for critical infrastructure, supporting specialized cybersecurity workflows. TAC is an identity- and trust-based framework designed to ensure that enhanced AI capabilities are controlled by verified defenders. Defenders verified through this framework will encounter fewer instances of model response refusals when performing tasks such as vulnerability identification, triage, malware analysis, binary reverse engineering, and patch validation. Starting June 1, 2026, individual members accessing these capabilities will be required to enable advanced account security protections. OpenAI is currently collaborating with security vendors such as Cisco, CrowdStrike, and Palo Alto Networks to accelerate the defensive cycle of the security ecosystem through GPT-5.5, enhancing the efficiency of vulnerability research, patching, monitoring, and supply chain security.