
OpenAI Expands Defender Access with GPT-5.4-Cyber
OpenAI unveiled GPT-5.4-Cyber, a cybersecurity-optimized variant of GPT-5.4, expanding access via its Trusted Access for Cyber program to thousands of defenders and hundreds of teams to accelerate vulnerability discovery and fixes while strengthening safeguards; the rollout follows rival Anthropic’s Mythos and aims to embed AI-driven security release cycles in developer workflows.
