OpenAI presented GPT-6 Astra on September 3, 2026, and for the first time classified one of its own models as "critical" on cyber capability. Given the right tools and access, the company says, Astra can find unknown vulnerabilities and build chains of exploitation. It reports 100% on ExploitBench, 99.9% on ARC-AGI-3 and 97.6% on FrontierMath Tier 4 v2. API pricing starts at $10 per million…