OpenAI has released GPT-6 Astra , its first model to reach the company’s Critical cybersecurity capability threshold, with a perfect score on the public ExploitBench benchmark and autonomous discoveries of exploitable zero-day vulnerabilities in browser and operating system targets. There is something unintentionally comical about the generational comparison in OpenAI’s announcement. Astra is the more sophisticated, better-aligned guest you can trust at a formal dinner party, excelling at “exercising care, respecting task boundaries, and communicating transparently,” according to OpenAI.