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Will Anthropic or OpenAI IPO first? — Polymarket Odds

Updated September 24, 2026 · Category: Economy & Fed · Market end date: January 1, 2028

As of September 24, 2026 at 15:51 UTC, Polymarket traders price Anthropic at 94.8% (OpenAI 5.1%), with $385.7K traded in total and $494 in the last 24 hours.

Current odds

OutcomeProbability24h changeVolume
Anthropic94.8%
+0.1 pts$385.7K
OpenAI5.1%
-0.1 pts

Total volume $385.7K · 24h volume $494 · Liquidity $33.7K. Prices are Polymarket YES-share prices read as probabilities; they are not executable quotes.

30-day price history

0%25%50%75%100%Aug 25Sep 24

Anthropic OpenAI · 30-day price history (12-hour points)

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How this market resolves

This market will resolve to "Anthropic" if Anthropic completes an Initial Public Offering (IPO) before OpenAI completes an IPO by December 31, 2027, 11:59 PM ET, as confirmed by official company announcements and credible news sources.

This market will resolve to "OpenAI" if OpenAI completes an Initial Public Offering (IPO) before Anthropic completes an IPO by December 31, 2027, 11:59 PM ET, as confirmed by official company announcements and credible news sources.

This market will resolve 50-50 if:

- Neither company completes an Initial Public Offering (IPO) by December 31, 2027, 11:59 PM ET;

- Both companies complete an IPO on the same calendar date (ET); or

- By December 31, 2027, 11:59 PM ET, both companies become unable to complete an IPO, including due to acquisition, merger, or absorption by an entity that is already publicly traded.

The IPO refers to the first sale of stock by the listed company to the public on any recognized stock exchange.

The resolution source for this market is a consensus of credible reporting.

Summary of the market's published rules. The rules on Polymarket control settlement; check them there before relying on any outcome: open this market on Polymarket.

Related markets

More odds by topic: IPOs odds · AI odds · OpenAI odds · Anthropic odds

Frequently asked questions

What are the current Polymarket odds for Will Anthropic or OpenAI IPO first?

As of September 24, 2026 at 15:51 UTC, Polymarket traders price Anthropic at 94.8% (OpenAI 5.1%), with $385.7K traded in total and $494 in the last 24 hours.

When does the Will Anthropic or OpenAI IPO first market end?

The event's listed end date is January 1, 2028. Each outcome settles under the market's written rules, summarised on this page, which can differ from the end-date field.

How are these odds calculated?

They are the displayed prices of each outcome's YES share on Polymarket. A price of 60¢ implies roughly a 60% chance. This page refreshes the numbers twice a day, so they are not live quotes.

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