OpenAI reportedly put 25% of its production engineers on AI-assisted security

In remarks shared by a16z on September 14, 2026, Greg Brockman said OpenAI paused projects for 25% of its production engineers so they could focus on security. He said the team fixed serious issues and, to its knowledge, had found all the critical problems Astra was capable of finding. The next model would bring another round of checks—a process he said OpenAI is working to automate through a “defense factory.”

Separately, a16z quoted Brockman claiming that 10,000 agents had solved the Navier-Stokes problem. He described implications for fluid dynamics and ocean currents, and argued that the claimed breakthrough opened possibilities for further scientific discovery and medicines.