Tags: cyber defense

OpenAI announced that its upcoming GPT-5.5 model performed on par with the heavily promoted Mythos Preview in recent cybersecurity evaluations. CEO Sam Altman criticized the hype surrounding Mythos, calling it fear‑based marketing, while reiterating that the new model will initially be available only to a select group of critical cyber defenders. The company’s Trusted Access for Cyber pilot, launched in February, continues to serve as the gateway for researchers and enterprises to test frontier models under strict safeguards. Lire la suite

OpenAI announced the release of GPT-5.4-Cyber, a defensive‑focused AI model with lowered refusal limits and binary reverse‑engineering capabilities. The company also scaled its Trusted Access for Cyber programme, moving from a pilot to thousands of vetted individual security professionals and hundreds of enterprise teams. The move counters Anthropic’s recent restriction of its Mythos model to a handful of large organisations, highlighting a split in how leading AI firms handle the dual‑use risks of cybersecurity tools. Lire la suite

Anthropic announced the limited release of Claude Mythos Preview, an AI model that can autonomously discover software flaws and generate working exploits. The company has placed the model in the hands of a select group of tech giants—including Microsoft, Apple, Google, and the Linux Foundation—through a consortium called Project Glasswing. Security experts say the system could dramatically lower the skill bar for creating multi‑stage exploit chains, prompting a reassessment of how organizations develop, patch, and defend software. Government officials are already discussing the potential fallout, underscoring the model’s far‑reaching implications. Lire la suite