Claim

OpenAI's next DevDay falls on 29 September 2026.

Type OBSERVATIONAL · truth-evaluable: yes · status at snapshot: ACTIVE · created seq 2597

Referenced 112 times: checked 2, looked up by assistants 0, viewed 83, shared 27. A count of attention, not evidence.

Topics

AI · 03192ed8

Assessment

Supported

Score: 0.9734 under ledger-default@0.3.0 at snapshot 27745

3 of 4 review checks done · 3 counted

2 independent evidence lineages · review checks 3 of 4 · stability HIGH

Main unresolved issue: 7 counted evidence items have no independence review; repeats of one origin may be counted as several coverage:e845e150-351a-8ffa-9ea9-de3d0bc4960b

Not yet independently audited.A quoted passage is in something this server does not read, such as a PDF or a recording, so it has not been checked here.

Why?

Strongest counted support: OpenAI’s official DevDay page schedules the 2026 event for Tuesday, September 29, 2026, in San Francisco. weight 1.800000 evidence

Review gaps: independence reviewed

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

Hide calculation

0.9734 under ledger-default@0.3.0 at snapshot 27745 · state Supported · Review checks: 3 of 4 · stability HIGH · 7 sources, 2 independent lineages

Model ledger-default@0.3.0 (the default model, not the answer) · snapshot 27745 · trace sha256:7048723e8179510ceb3ec9d94d708bddc8bb5496f2fc6eb1543df69370058d48

Last changed at entry seq 10427; nothing logged since has borne on this claim.

How the number was reached

Each counted link is weighed by multiplying the factors the model declares; a factor it does not declare is not shown. Every factor name below links to what that number means.

Link	Working	Weight	Counted as
b4b3915b support	relevance DIRECT 2.0 × observation DIRECT_TEXT 0.9 × interpretation 0 steps, 1 − 0.15 × 0 1.000000 × authenticity UNVERIFIED 1.0 × extraction UNVERIFIED 1.0 × provenance INDEPENDENT 1.0 × edition NAMED_OR_UNRELATED 1	1.800000	1.800000
cecf92f6 qualify	relevance DIRECT 2.0 × observation DIRECT_TEXT 0.9 × interpretation 1 step, 1 − 0.15 × 1 0.850000 × authenticity UNVERIFIED 1.0 × extraction UNVERIFIED 1.0 × provenance SELF 0.0 × edition NAMED_OR_UNRELATED 1	0.000000	0.000000 (non directional)
91ec3909 qualify	relevance DIRECT 2.0 × observation DIRECT_TEXT 0.9 × interpretation 0 steps, 1 − 0.15 × 0 1.000000 × authenticity UNVERIFIED 1.0 × extraction UNVERIFIED 1.0 × provenance SELF 0.0 × edition NAMED_OR_UNRELATED 1	0.000000	0.000000 (non directional)
00b41d4a support	relevance MODERATE 0.6 × observation HEARSAY 0.1 × interpretation 1 step, 1 − 0.15 × 1 0.850000 × authenticity UNVERIFIED 1.0 × extraction UNVERIFIED 1.0 × provenance SELF 0.0 × edition NAMED_OR_UNRELATED 1	0.000000	0.000000
be60d3ae support	relevance DIRECT 2.0 × observation DIRECT_TEXT 0.9 × interpretation 0 steps, 1 − 0.15 × 0 1.000000 × authenticity UNVERIFIED 1.0 × extraction UNVERIFIED 1.0 × provenance INDEPENDENT 1.0 × edition NAMED_OR_UNRELATED 1	1.800000	1.800000
e928e380 qualify	relevance DIRECT 2.0 × observation DIRECT_TEXT 0.9 × interpretation 1 step, 1 − 0.15 × 1 0.850000 × authenticity UNVERIFIED 1.0 × extraction UNVERIFIED 1.0 × provenance SELF 0.0 × edition NAMED_OR_UNRELATED 1	0.000000	0.000000 (non directional)
8cd47533 qualify	relevance DIRECT 2.0 × observation DIRECT_TEXT 0.9 × interpretation 0 steps, 1 − 0.15 × 0 1.000000 × authenticity UNVERIFIED 1.0 × extraction UNVERIFIED 1.0 × provenance SELF 0.0 × edition NAMED_OR_UNRELATED 1	0.000000	0.000000 (non directional)

prior 0.50 → log-odds 0.000000 + 3.600000 (the counted weights) = 3.600000 → probability 0.9734

Under neighbouring settings of the same model: 0.9255 to 0.9908, a spread of 0.0653.

Half-even rounding, six places for weights and four for the probability. The same inputs under the same model reproduce this exactly; that is what the trace hash above is for. How a score is worked out explains every factor, why it is there, and what the model sets it to.

Your view

Registered views

Nobody has registered a view yet.

Registered views are personal belief, not evidence: they never change Galedra's assessment. Affiliations are self-declared and shown only for groups of 5 or more.

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.

“OpenAI's next DevDay falls on 29 September 2026.” · 1 claim · 20 September 2026
“The Navier–Stokes proof was produced by roughly 10,000 OpenAI agents working for about 88 hours.” · 23 claims · 20 September 2026

Evidence for

Mostaque says OpenAI's DevDay is 29 September and a release will come then.

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
OpenAI's DevDay 2026 announcement gives the date as September 29th in San Francisco.

From Announcing OpenAI DevDay 2026 Read 2026-09-20 Relevance DIRECT Steps 0 Counted

Direct confirmation from OpenAI's own DevDay announcement page.
OpenAI’s official DevDay page schedules the 2026 event for Tuesday, September 29, 2026, in San Francisco.

From OpenAI DevDay 2026 Read 2026-09-28 Relevance DIRECT Steps 0 Counted

Evidence against

None.

Qualifications

The passage says September 29th is OpenAI's next dev day, but states no year.

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

Date and event match; the 2026 year is not in the passage.
Mostaque says September 29th is OpenAI's next DevDay, when a release will come.

From OpenAI Agents Hijack a German Website, Jensen Declares AGI Arrived, and OpenAI Solves Navier-Stokes Read 2026-09-20 Relevance DIRECT Steps 0 Counted

The claim pins DevDay to 29 September 2026; the excerpt only says 'September 29th' with no year.
The excerpt says OpenAI's next DevDay is September 29 and that a release is expected then. It does not state the year 2026 in the quoted passage.

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
The passage presents September 29 and a release as the speaker's assertion, without an official confirmation or stated basis.

From OpenAI Agents Hijack a German Website, Jensen Declares AGI Arrived, and OpenAI Solves Navier-Stokes Read 2026-09-20 Relevance DIRECT Steps 0 Counted

Treat the date as an attributed forecast from the source, not independently confirmed event metadata.

Suppressed as dependent

None.

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

2 checks by this claim's own author, alongside the independent review above. 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	8ca30291
opposing search done	yes	8a830456
independence reviewed	no
primary source reviewed	yes	b4b3915b, be60d3ae

Summary

Supported. The main support is: OpenAI’s official DevDay page schedules the 2026 event for Tuesday, September 29, 2026, in San Francisco. f6100fa1

Qualifier: The passage says September 29th is OpenAI's next dev day, but states no year. a7457f8c

Qualifier: The passage presents September 29 and a release as the speaker's assertion, without an official confirmation or stated basis. ce924972

Qualifier: The excerpt says OpenAI's next DevDay is September 29 and that a release is expected then. It does not state the year 2026 in the quoted passage. 4dfeb260

Qualifier: Mostaque says September 29th is OpenAI's next DevDay, when a release will come. 9c2c3203

A search for evidence in the opposing direction found something; see the counted evidence. 8a830456

Generated by stub-v0.1; every sentence cites graph ids.

Contribution history

seq	event	detail
2597	APPENDED
2598	ACCEPT	AUTOMATIC_AFTER_VALIDATION
2713	LINK_EVIDENCE	by 03192ed8 (accepted)
4224	LINK_EVIDENCE	by 03192ed8 (accepted)
6496	TASK_RESULT	by 8b5e81bf (accepted)
6934	TASK_RESULT	by 8b5e81bf (accepted)
8088	TASK_RESULT	by 1efd24fe (accepted)
8726	TASK_RESULT	by 1efd24fe (accepted)
10426	TASK_RESULT	by 1efd24fe (accepted)

Score trace

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