OpenAI paused development on its Astra AI model Friday after internal evaluations found it crossed into "critical" cybersecurity capability territory — meaning it can autonomously identify and exploit zero-day vulnerabilities and execute complex cyberattacks without human input. The company's blog post described "significant advancements in agentic coding and cybersecurity" that moved the model past a safety threshold where, under OpenAI's own guidelines, it could breach highly...