OpenAI's Astra Model Reaches Critical Cybersecurity Capability, Raises Legibility Concerns

OpenAI's Astra system card confirms that GPT-6 Astra is the first model to achieve the "Critical" cybersecurity capability threshold under OpenAI's Preparedness Framework, demonstrating the ability to identify unknown security flaws and develop new exploits across well-protected systems without human guidance. This advancement, however, is coupled with a structural trade-off: an opaque recurrence architecture that produces internal traces significantly less legible than its predecessor, GPT-5.6 Sol.