OpenAI
2026-09-08
Claimed AI-led
- Model
- Unnamed OpenAI model described as more capable than GPT-6 Astra for the proof; GPT-6 Astra through Codex for the Lean formalization
- Field
- mathematics
- Posed
- 2000 · open 26 yrs
Finite-time blowup for Navier-Stokes with smooth forcing, Clay alternatives C and D#
A Lean development proves that three-dimensional Navier-Stokes with a smooth forcing term breaks down in finite time, at every positive viscosity, on both Euclidean space and the periodic torus, which is two of the four statements the Clay problem description asks for a proof of, though not the unforced regularity question the phrase usually brings to mind.
Fefferman's Clay problem description asks for a proof of one of four statements, offered as leeway to solvers while, in his words, retaining the heart of the problem. This work settles (C) and (D), the two breakdown alternatives, both of which permit a smooth external force meeting the decay conditions the description imposes: for every positive viscosity there exist smooth initial data and forcing admitting no global smooth solution of uniformly bounded kinetic energy on R^3, and smooth periodic data and forcing admitting no global smooth solution on R^3/Z^3. The repository carries Lean 4 proofs of both, declared as navier_stokes_breakdown_R3 and navier_stokes_breakdown_periodic, each recorded with no sorry and depending on exactly propext, Classical.choice and Quot.sound. The Comparator reference statements were adapted from Google DeepMind's Formal Conjectures formalization of the Clay problem rather than written for this repository, and the challenge config enables the independent nanoda kernel. The same repository also carries two theorems on unforced Euler blowup, which are a separate result and are not covered by this entry.
- Original work
- GitHubOpenAIclaymath.org+1
- Announced
- OpenAI
- Media
- QuantaNatureScience
- claymath.orgTerence TaoVibeMathed
- Challenge
- cims.nyu.edu
Novelty check, caveats & sources
Novelty check
The alternatives settled here are Clay's own (C) and (D), stated in Fefferman's 2000 problem description, which the repository cites and links directly; the underlying regularity question goes back to Leray in 1934. The prior literature on forced or modified blowup is substantial but does not reach full three-dimensional Navier-Stokes with smooth forcing: blowup is known for the hypodissipative equations with a force (arXiv:2407.06776), for solutions with linear growth at infinity (arXiv:2103.12237), and for model equations (arXiv:1811.09394), and Tao's averaged Navier-Stokes construction is of the same character. No prior claim on (C) or (D) themselves was found in the four registries or in that search. The live novelty question is not priority over the classical literature but priority within the past year: OpenAI's own account credits the basic idea of the program to Diego Cordoba and Luis Martinez-Zoroa, and how much is owed to that program is publicly disputed, which the caveats record.
Caveats
What this settles, and what it does not, needs stating carefully. Fefferman's problem description asks for a proof of any one of four statements, and the breakdown alternatives (C) and (D) are two of them, so on the problem as officially posed this is a candidate solution to the Millennium Prize Problem rather than something adjacent to it. The Clay Mathematics Institute said as much on 2026-09-11, that the problem has 'apparently been settled', while noting that its own process for evaluating the work and assigning credit is deliberately unhurried. What the result is not is a resolution of the unforced regularity question, alternatives (A) and (B), which is what the phrase 'the Navier-Stokes problem' is usually taken to name and what a reader of the press coverage would most likely assume was meant. The repository's README names the alternatives precisely and links Clay's own description, which is more care than most of that coverage took. Verification is graded claimed rather than formal despite four theorems carrying no sorry and exactly the three standard axioms, for the reason the repository itself supplies: its formalization.yaml records the review status as self-assessed, and no mathematician outside OpenAI is on record as having read the argument. Clay's own acceptance process additionally requires journal publication and two years of community acceptance. The statement-fidelity worry is smaller here than on a self-stated formalization, because the Comparator challenge statements were adapted from DeepMind's independent Formal Conjectures formalization rather than authored alongside the proof, but that adaptation has not itself been checked by a third party. The model attribution is split, and both halves are recorded above because they may describe different steps: the announcement describes an unnamed next-generation model more capable than GPT-6 Astra, reported as roughly 10,000 coordinating agents over 88 hours, while the repository's own metadata credits GPT-6 Astra through Codex under an agent method, which most plausibly describes who wrote the Lean rather than who found the proof. Autonomy is ai-led rather than autonomous because the disclosure describes an agent framework without stating that the run was unsteered, so the strictest defensible reading is not autonomous. Priority is contested in public and unresolved at entry: the entangled Alpoge and Buckmaster results released the same week drew allegations, on r/math and in the comments of Terence Tao's blog, that the Cordoba and Martinez-Zoroa program was worked from for roughly a year before a denial that several commenters read as evasive, and Andreas Thom has publicly described asking OpenAI whether his own private conversations on an adjacent problem were drawn on and being told they were not, without further explanation. None of that bears on whether the Lean compiles.