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On the Navier–Stokes Millennium Prize Problem

Simon Willison · Sep 08, 2026 · Research Findings

OpenAI claims to have resolved the Navier-Stokes problem using an unreleased model.

“I asked whether the model had been trained on, or had access to, our sessions in Codex.”

OpenAI has reportedly made significant progress in solving the Navier-Stokes Millennium Prize Problem. The development has raised ethical concerns due to collaborative tensions with researchers from Anthropic, who had been working on similar challenges.

Navier-Stokes AI Research OpenAI

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