Claim

Model ledger-default@0.1.0 ledger-strict@0.1.0 ledger-default@0.2.0 ledger-strict@0.2.0 ledger-default@0.3.0 (default) ledger-strict@0.3.0 Snapshot seq

Topics

AI · 03192ed8 Mathematics · 03192ed8

Assessment

Why?

Strongest counted support: A source reproducing Sam Altman’s post dates it to September 8, 2026. weight 1.800000 evidence

Suppressed as dependent: A speaker says Altman posted surprise on social media in the past 24 hours about OpenAI solving Navier-Stokes.; The excerpt says Sam Altman expressed surprise on social media within the previous 24 hours that OpenAI solved Navier-Stokes.

Review gaps: independence reviewed

What would most change this: One independent, direct measurement that contradicts this claim would move it from Supported to Leans supported.

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Checked as part of

Statements this claim was broken out of. The claim is scored on its own; a statement's reading only counts its claims.

• “Sam Altman posted on social media within 24 hours of this recording expressing surprise that OpenAI had solved Navier-Stokes.” · 1 claim · 28 September 2026
• “Sam Altman posted on social media within 24 hours of this recording expressing surprise that OpenAI had solved Navier-Stokes.” · 1 claim · 28 September 2026
• “Sam Altman posted on social media within 24 hours of this recording expressing surprise that OpenAI had solved Navier-Stokes.” · 1 claim · 28 September 2026
• “In 1937 the economist Ronald Coase asked why companies exist at all, and he won a Nobel Prize for that work.” · 6 claims · 20 September 2026
• “The Navier–Stokes proof was produced by roughly 10,000 OpenAI agents working for about 88 hours.” · 28 claims · 20 September 2026

Evidence for

• Wissner-Gross says Altman posted surprise at the Navier-Stokes result within 24 hours.

  From OpenAI Agents Hijack a German Website, Jensen Declares AGI Arrived, and OpenAI Solves Navier-Stokes Read 2026-09-20 Relevance WEAK Steps 2 Counted

  The speaker's 'shocked, shocked' framing makes it unclear whether the surprise was sincere.

• A speaker says Altman posted surprise on social media in the past 24 hours about OpenAI solving Navier-Stokes.

  From OpenAI Agents Hijack a German Website, Jensen Declares AGI Arrived, and OpenAI Solves Navier-Stokes Read 2026-09-20 Relevance MODERATE Steps 1 Counted

  Matches the claim on timing, medium and content. It is a secondhand description of the post rather than the post itself, and the 'shocked, shocked' phrasing suggests the speaker read the surprise as performative.

• The excerpt says Sam Altman expressed surprise on social media within the previous 24 hours that OpenAI solved Navier-Stokes.

  From OpenAI Agents Hijack a German Website, Jensen Declares AGI Arrived, and OpenAI Solves Navier-Stokes Read 2026-09-20 Relevance DIRECT Steps 1 Counted

• A September 8, 2026 post attributed to Sam Altman expresses curiosity about whether OpenAI could solve a Millennium problem and discusses the Navier–Stokes result; it establishes a social-media post but does not use the exact word 'surprise' or independently establish the recording date needed to verify a 24-hour interval.

  From I spent much of the weekend talking with the team who did this work Read 2026-09-28 Relevance MODERATE Steps 0 Counted

  This is first-party text reproduced by a secondary page, and supports the existence and subject of the post while leaving the exact timing and characterization partly unresolved.

• A source reproducing Sam Altman’s post dates it to September 8, 2026.

  From I spent much of the weekend talking with the team who did this work. Read 2026-09-28 Relevance DIRECT Steps 0 Counted

  Supports the existence and date of the social-media post, consistent with a post within a day of the recorded episode.

• The reproduced post says Altman spent the weekend discussing the work with its team.

  From I spent much of the weekend talking with the team who did this work. Read 2026-09-28 Relevance MODERATE Steps 1 Counted

  Supports Altman’s contemporaneous reaction to the work, though it does not use the exact word surprise.

• The post says rumors prompted OpenAI to test whether its model could solve a Millennium problem.

  From I spent much of the weekend talking with the team who did this work. Read 2026-09-28 Relevance MODERATE Steps 1 Counted

  Supports the context of surprise or curiosity around the model’s result, but the exact 24-hour interval and wording remain unresolved.

Evidence against

None.

Qualifications

• Altman called the result one of the most amazing moments in OpenAI's history.

  From Sam Altman Gushes as OpenAI Shares 'Solution' to 90-Year-Old Math Problem Tackled by 10,000 AI Agents Read 2026-09-20 Relevance MODERATE Steps 2 Counted

  The timing and the fact of the post hold. Surprise does not: the language is amazement and pride, and reporting indicates OpenAI aimed the effort at the problem deliberately after hearing of a competitor's progress, which is the opposite of being caught off guard. Separately and more importantly for neighbouring claims, the Clay Millennium problem was not solved. The result concerns finite-time singularity in a forced three-dimensional case; the unforced problem remains open.

• Popular AI reproduces an Altman post saying he spent the weekend with the team and initially believed another team had solved the problem.

  From OpenAI Navier-Stokes solution raises an AI provenance problem Read 2026-09-28 Relevance MODERATE Steps 0 Counted

  Supports existence and substance of the post, but does not establish that it was within 24 hours or that Altman expressed surprise.

• A September 2026 interview report quotes Altman expressing surprise that OpenAI's model solved Navier–Stokes in 2026, but does not establish a social-media post within 24 hours.

  From Sam Altman: OpenAI Not in a Hurry to Go Public in 2026 Read 2026-09-28 Relevance MODERATE Steps 0 Counted

  The source supports the surprise wording but not the claim's specific social-media channel or 24-hour timing.

Suppressed as dependent

Evidence	Group	Kept instead
8c604cdb		90c76941
fbbd484c		90c76941

Inferences

Concluded from

None.

Used as a premise in

None.

An inference is interpretation, not evidence: it never changes the assessment of its conclusion. Each premise is a claim with its own evidence.

Threads

None. Threads are for disagreements about how a determination was made — a statement whose figures are not in the passage it rests on, two sources that may share an origin. Something about the world belongs in the evidence above.

Claim edges

None. Edges are stored and displayed; v0.1 does not propagate probability across them.

Review checklist

Review checks: 3 of 4

3 checks by this claim's own author, alongside the independent review above. 1 OPPOSING EVIDENCE SEARCH · 1 QUALIFIER CHECK · 1 EVIDENCE VERIFICATION. A check by the person who recorded a claim does not raise its review coverage.

Check	Done	By
qualifiers reviewed	yes	e22df8e4
opposing search done	yes	9a41d5da
independence reviewed	no
primary source reviewed	yes	1ed20a9b

Summary

Contribution history

seq	event	detail
3395	APPENDED
3396	ACCEPT	AUTOMATIC_AFTER_VALIDATION
3539	LINK_EVIDENCE	by 03192ed8 (accepted)
3860	TASK_RESULT	by 03192ed8 (accepted)
4673	LINK_EVIDENCE	by e82bf250 (accepted)
7940	TASK_RESULT	by 1efd24fe (accepted)
9417	LINK_EVIDENCE	by 1efd24fe (accepted)
9426	LINK_EVIDENCE	by 1efd24fe (accepted)
9976	LINK_EVIDENCE	by 1efd24fe (accepted)
10159	TASK_RESULT	by 1efd24fe (accepted)