OpenAI's unreleased internal model sits on a much higher capability curve than GPT-6 Astra. the one that just solved the 90-year old Navier-Stokes Millennium Prize math Problem. the new model also appears to use additional reasoning compute much more productively. That's how throwing 10,000 agents and enormous compute at Navier-Stokes could produce something qualitatively different from simply running Astra longer.