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Home/AI / Tech/Will OpenAI IPO by August 31 2026?
PolymarketAI / TechUpdated 5m ago

Will OpenAI IPO by August 31 2026?

Market probability
0.3%
Little changed over 24 hours
29 days until the event deadline
Deadline: September 15, 2026 at 11:23 AM ET

No meaningful repricing — the probability is steady.

The pricing is supported by healthy trading volume and market depth, a tight spread.

How credible was the move?

Three separate questions — a move can be genuine while the latest price is still settling. Methodology →

Move validity

Is the move backed by real trading and depth?

Strong

The pricing is supported by healthy trading volume and market depth, a tight spread.

Consensus stability

Has the market settled at the new probability?

Stable

The probability has held near its current level over the past several hours.

Contract clarity

Will the rules resolve without ambiguity?

High

The resolution rules are relatively specific, with a named source and a defined deadline.

Recent trade activity$225.6 traded

From the latest trade tape (most recent 200 prints) — a live activity sample, not a lifetime total.

What this market actually measures

This market will resolve to "Yes" if OpenAI completes an Initial Public Offering (IPO) by the listed date ET, as confirmed by official company announcements and credible news sources. Otherwise, this market will resolve to "No".

This summary shows the opening of the venue's official rules. ProbCast has not yet generated an independent plain-English interpretation for this contract — review the full rules before relying on it.

View full official resolution rules

This market will resolve to "Yes" if OpenAI completes an Initial Public Offering (IPO) by the listed date ET, as confirmed by official company announcements and credible news sources. Otherwise, this market will resolve to "No". The IPO refers to the first sale of stock by the listed company to the public on any recognized stock exchange. If OpenAI is acquired by another company that is already public, this market will immediately resolve to "No." The resolution source for this market is a consensus of credible reporting.

What could move this market next?

  • The market's deadline arrivesSeptember 15, 2026 at 11:23 AM ET

    The contract must resolve based on what has happened by this date.

Derived from the contract's own mechanics as of Aug 16, 11:26 AM ET. ProbCast does not list scheduled meetings, announcements, or data releases it cannot verify.

Advanced analysis (experimental)

Research signals — these models are still accumulating the history needed for full validation, and they can disagree with the headline read. Model confidence: high · expected error ±10 pts.

Quote-drivenLegacy movement classifier: watch

What's happening

medium classifier confidence
Quote-driven

A tight, deep, quote-driven book with little executed flow. The price is stable but reflects resting quotes more than active trading.

Market data

24h volume

$56.9K

Liquidity

$59.9K

Total volume

$192.6K

Change (pts)1H0.06H+0.224H+0.27D+0.2
Score breakdown — Movement, Liquidity & Trust

ProbCast Trust Score

76/ 100 · Medium

Reasonably supported. Generally reliable, with minor caveats. Main caveat: limited history.

ProbCast measures how reliable this market probability appears — not what to trade.

Movement4

Magnitude of recent probability change

Liquidity79

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ProbCast — Odds Reliability

Know whether prediction-market odds can be trusted. ProbCast analyzes liquidity, market activity, spreads, and price movement to help distinguish meaningful repricing from thin-market noise.

Questions? Chat with us on Telegram
TodayTop MoversEventsAll MarketsWhat ChangedVenue DivergencePolymarket vs KalshiMethodologyCoverageMeta's ArenaWatchlistTerms of UsePrivacyCrypto
  • Tight spread on a liquid, calm market

The latest price is a usable but caveated read — weigh it with the market state.

More details — reliability score, dynamics, durability
Reliability score
50Medium
Where the price path tends to go next278 observed
  • Stable consensus91%
  • Choppy / mean-reverting5%
  • Trend continuation2%

Short-term motion of the price line (~1h), distinct from the environment above — not a prediction of the final outcome.

DurabilityHigh· half-life ~5d
PredictabilityStable

Secondary read: leaning toward Trading normally.

A read-only classification of the market environment — how much weight the current price deserves as a read of consensus. It describes conditions, never a trade.

Category
AI / Tech
Venue
Polymarket
Open interest
—
Spread
0.3 pts
Best bid
0.1%
Best ask
0.4%
7-day range
0.1% – 0.3%
Resolves
Sep 15, 2026

Depth of the order book and volume

Trust breakdown

76/100 · Medium

Reasonably supported. Generally reliable, with minor caveats. Main caveat: limited history.

  • Liquidity anchor+56
  • Price steadiness+29
  • Limited history-8
Trust score76 / 100
How these scores work →
View on Polymarket

ProbCast provides prediction-market data and analytics for informational purposes only. Not financial, trading, betting, investment, legal, or tax advice. Market-implied probabilities can be wrong, illiquid, manipulated, or affected by ambiguous resolution rules.

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Iran leadership change by August 31?

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ProbCast provides prediction-market data and analytics for informational purposes only. Not financial, trading, betting, investment, legal, or tax advice. ProbCast is not a betting platform, exchange, or broker and does not provide buy or sell recommendations. Intended for users 18+; availability of prediction-market activity varies by jurisdiction. Venue data is aggregated from third parties and may be delayed or inaccurate. See our Terms of Use.

Market-implied probabilities can be wrong, illiquid, manipulated, or affected by ambiguous resolution rules.

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