GPT-5.4-Cyber
ProprietaryMultimodalCybersecurity
About
GPT-5.4-Cyber is a cybersecurity-specialized variant of GPT-5.4, released April 14, 2026 as part of OpenAI's scaled Trusted Access for Cyber (TAC) program. It has a lowered refusal boundary to support legitimate defensive security workflows including vulnerability analysis, threat detection, exploit research, and automated defense tasks. Access is restricted exclusively to verified TAC program participants — no public API. Context window, parameters, and pricing are not publicly disclosed. Announced alongside Claude Mythos Preview (Anthropic's competing restricted cybersecurity model via Project Glasswing).
Capabilities
VisionMultimodalReasoningFunction CallingTool UseJSON ModeCode Execution
