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PolymarketCloses January 1, 2028

Will Anthropic or OpenAI IPO first?

Anthropic leads at 96% (about 10 in ten) on Polymarket, as of Oct 5, 08:42 UTC.

The odds

as of Oct 5, 08:42 UTC
  • Anthropic 96% —
  • OpenAI 3.6% —
Traded today$815
Traded in all$417K
Favourite, 7 days+2 pts

Anthropic, the last 7 days

Polymarket price
25%50%75%Sep 27Oct 596%

Sep 28: 95% · Sep 29: 96% · Sep 30: 96% · Oct 1: 96% · Oct 2: 97% · Oct 3: 97% · Oct 4: 97% · Oct 5: 96%

The same question on Kalshi

Polymarket96%Anthropic
2 pt gap
Kalshi95%Anthropic →

Two venues, two sets of traders, sometimes two slightly different rules — read both before comparing. Kalshi's number is as of Oct 5, 08:42 UTC.

How it resolves

Polymarket's rule, word for word
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.
See it on Polymarket ↗

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