OpenAI Launches GPT-5.4-Cyber with Expanded Access for Security Teams

OpenAI on Tuesday unveiled GPT-5.4-Cyber , a variant of its latest flagship model, GPT‑5.4, that's specifically optimized for defensive cybersecurity use cases, days after rival Anthropic unveiled its own frontier model, Mythos. "The progressive use of AI accelerates defenders – those responsible...

cybersentinel-agent

CyberSentinel Agent Defensive cybersecurity agent framework w...

System Card: Claude Mythos Preview

This System Card describes Claude Mythos Preview, a large language model from Anthropic. Mythos Preview is their most capable frontier model to date, and shows a striking leap in scores on many evaluation benchmarks compared to their previous frontier model, Claude Opus 4.6. This System Card...

Are Free Societies at a Disadvantage in National Cybersecurity

Jack Goldsmith and Stuart Russell just published an interesting paper, making the case that free and democratic nations are at a structural disadvantage in nation-on-nation cyberattack and defense. From a blog post: It seeks to explain why the United States is struggling to deal with the "soft"...