To solve the Navier–Stokes problem, OpenAI used an internal model that is significantly more capable than GPT‑6 Astra.
GPT-6.7 Supernova, go delete yourself!
The more interesting fact in my view is that it was trained in only.. 4 days? "Since August 28th we had been training... by september 1st we saw a step change in performance across internal benchmarks"