OpenAI IPO closing market cap above ___ ?

Polymarket Finance › IPOs & deals Closes Dec 31, 2027 · $446 today · $1.6M traded · $24.1K at stake · prices read just now

The odds

$1.19Tmedian

$600B$1.8T

Median $1.19T

How the odds have moved

Median: $1.57T on Oct 21, $1.19T now.

The median the market implied over time and its middle half (the band), read from every strike's prices on Polymarket.

Every outcome

Outcome	Chance	Day	Bid	Ask	Pays	Traded
$800B	73%	▼ 1	72¢	74¢	$1.36	$129K
$1T	68%	▲ 1	66¢	70¢	$1.43	$1.1M
$1.2T	50%	▼ 11	28¢	71¢	$1.41	$251K
$1.4T	47%	▼ 7	44¢	49¢	$2.04	$74.5K
$1.6T	36%	▲ 5	30¢	42¢	$2.38	$56.3K

"Pays" is what a $1 stake returns if that outcome happens, at the price shown (before any fees). Bid and ask are the best prices to sell and buy "Yes".

The news: OpenAI, ChatGPT, OpenAI IPO

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Paxton Sues OpenAI and Sam Altman, Seeks to Block Minors From ChatGPT@cdnnow · 45 h agoTexas Attorney General Ken Paxton has sued OpenAI and CEO Sam Altman, accusing the ChatGPT maker of marketing its chatbot as safe while failing to protect Texans, including children. The lawsuit, filed Friday in Collin County district…
Sweden's Government Offices Block ChatGPT and Claude, Keep Microsoft CopilotDecrypt · 3 days agoSweden's Government Offices—the administrative body supporting the prime minister and cabinet—will block ChatGPT and Claude on staff computers from Monday, directing civil servants to Microsoft's Copilot as the only approved AI tool…
UK commits £100M to AI biosecurity lab with OpenAI, Anthropic, DeepMindCrypto Briefing · 3 days agoEstefano Gomez is an editor at Crypto Briefing specializing in blockchain analysis, DeFi, and the intersection of crypto and digital art. He previously served as Editor in Chief at Interesante for over three years, where he covered…
Texas Sues OpenAI, Altman Over ChatGPT Safety Claims@law360 · 4 days agoThe Texas attorney general's office sued OpenAI and its chief executive Sam Altman in state court Friday, alleging the company breached consumer protection laws by unleashing a chatbot that often gives harmful advice and is addictive to…
Chatbot AI Service Comparison: OpenAI ChatGPT vs Claude vs Gemini (for CRM Actions)DEV Community · 3 days agoShort answer: Choose OpenAI ChatGPT for dynamic casual dialogue, Claude for explainable complex reasoning, and Gemini when minimal-response latency dominates; keep all three behind one CRM action contract. The boundary is simple: the model…
Intapp Launches Celeste Plug-in for OpenAI's ChatGPT EnterpriseMarketScreener · 4 days agoIntapp said Thursday it is launching its Celeste plug-in for law firms on Microsoft-backed OpenAI's ChatGPT Enterprise. The company said Celeste is an AI coworker that was designed to handle... Intapp Launches Celeste Plug-in for OpenAI's…
OpenAI trims valuation target to $1.25 trillion after investor resistanceCrypto Briefing · 4 days agoEstefano Gomez is an editor at Crypto Briefing specializing in blockchain analysis, DeFi, and the intersection of crypto and digital art. He previously served as Editor in Chief at Interesante for over three years, where he covered…
Texas Attorney General Ken Paxton sues ChatGPT-maker OpenAI@kbtxnews · 4 days agoTEXAS (The Texas Tribune) - Attorney General Ken Paxton is suing OpenAI, the maker of ChatGPT, for allegedly deceiving and harming Texans. This is the latest in a flurry of lawsuits filed against Big Tech companies and private corporations…
Texas AG Ken Paxton sues OpenAI over ChatGPT safety claimsHouston Chronicle · 4 days agoTexas Attorney General Ken Paxton is suing technology company OpenAI for allegedly failing to protect Texans from the harms of using ChatGPT. Paxton speaks during a news conference with U.S. Energy Secretary Chris Wright in Houston on…
Paxton Sues OpenAI And Sam Altman Over Suicide Claims, Seeks ChatGPT Ban For Texas Kidswbap.com · 3 days agoTexas Attorney General Ken Paxton (R) sued OpenAI and CEO Sam Altman on Friday, accusing them of misleading Texans about ChatGPT’s safety and asking a court to bar the chatbot for minors in the state. The 67-page petition names six OpenAI…
What is OpenAI 'dots'? A Thorough Explanation of 5 Differences from ChatGPT and How to Get Started [2026 Edition]note（ノート） · 2 days agoFrom the 'era of asking AI questions' to the 'era of delegating work to AI'. A service that makes you feel such a change has been released by OpenAI. Its name is 'dots'. It is a new AI agent announced on September 29, 2026. ChatGPT until…
Human vs. ChatGPT NFL Week 7 betting picks: Human clings to profit as AI claims third straight winOutKick · 46 h agoColin Cowherd predicts the best bets entering Week 7 of the NFL season, including the Cincinnati Bengals, Atlanta Falcons, and Kansas City Chiefs. Apparently, the robot doesn't even have to make money to beat me anymore. ChatGPT finished…

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Anthropic IPO by __?

Nov 23, 2026even chance by

October 31, 2026<1%
November 15, 20265%▲ 1
November 30, 202690%▲ 31

2 more

December 15, 202690%▲ 9
December 31, 202694%▲ 11

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Anthropic IPO Closing Market Cap

30%$1.75–$2.0T

$1.75–$2.0T30%▲ 2
$2.0–$2.25T21%▼ 1
$1.5–$1.75T18%▲ 1

7 more

$2.25–$2.5T12%
$1.25–$1.5T7%▲ 2
$2.5–$2.75T3%
No IPO by December 31, 20273%
<$1.25T3%▼ 3
$3.0T+2%
$2.75–$3.0T2%▲ 1

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What will Anthropic's public ticker be?

99%$ANT

$ANT99%▲ 47
$ANTH1%▼ 24
$AAI<1%▼ 8

6 more

$ANAI<1%▼ 3
$APBC<1%▼ 4
$ARPC<1%▼ 1
$CLAU<1%▼ 5
$CLD<1%▼ 1
$CLDE<1%▼ 5

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In which month will Anthropic IPO?

85%November 2026

November 202685%▲ 25
December 20268%▼ 15
January 20273%▼ 3

13 more

April 20271%▼ 2
March 20271%▼ 3
May 20271%▼ 1
February 2027<1%▼ 1
October 2026<1%▼ 1
June 2027<1%
No IPO before 2028<1%▼ 1
July 2027<1%
August 2027<1%
September 2027<1%
October 2027<1%
November 2027<1%
December 2027<1%

Finance › IPOs & deals

What will OpenAI's IPO valuation be?

$1.51Tmedian

$750B$2.75T

Median $1.51TMiddle half $972.34B – $1.83T

Finance › IPOs & deals

When will Anthropic officially announce an IPO?

Nov 18, 2026even chance by

Before Nov 1, 20261%
Before Dec 1, 202688%▲ 16
Before Jan 1, 202793%▲ 12

3 more

Before Feb 1, 202794%▲ 6
Before Mar 1, 202795%▲ 3
Before Apr 1, 202796%▲ 2

Odds are traders' prices on Kalshi, Polymarket, ForecastEx and Crypto.com, not forecasts by 4Conservative. Prices read from the venues just now. Prices may be delayed. Money traded on Kalshi and ForecastEx is estimated from contracts. Not betting or investment advice.

About this market

VenuePolymarket

Trading closesDec 31, 2027 11:59 PM ET

Traded$1.6M

Today$446

This week$4.9K

At stake$24.1K

In the news186 headlines today, 1,741 this week

Followed here sinceOct 19, 2026

The rules

This market will resolve to “Yes” if the official closing price for OpenAI's market capitalization on its first trading day is above the listed value. Otherwise, it will resolve to “No”. If no IPO occurs by December 31, 2027, 11:59 PM ET, this market will resolve to “No”. Market capitalization is defined as the total number of outstanding shares multiplied by the closing share price on the first trading day. Resolution will be based on the primary exchange’s official listing page. In the event that the relevant figure is not displayed, another reliable source will be used. In the event of an interruption in the course of the normal trading session on OpenAI's first day of trading (e.g.,

The full rules are on the market's page at Polymarket.

Reading the odds

A prediction market trades contracts that pay $1 if something happens. Its price is the market's chance: a contract at 62¢ means traders give it 62%. Each number here is the midpoint between the best bid and offer, or the last trade when they are more than ten cents apart.

For a question with many answers (who wins, which range a number lands in), the chances are scaled to add up to 100%. A price ladder ("above 4.25%, above 4.50% ...") gives a whole distribution: its median is where traders see an even chance either way.

Kalshi is a U.S. exchange regulated by the CFTC; its money is counted in contracts, shown here as dollars at their price. Polymarket counts dollars. ForecastEx is Interactive Brokers' exchange, regulated by the CFTC; its contracts too are shown as dollars at their price. Crypto.com lists its markets on Crypto.com | Derivatives North America, a U.S. exchange regulated by the CFTC; it reports the dollars traded. Where more than one asks the same question, each is shown, never averaged.

Prefer betting odds? Switch to American (+150) or decimal (2.50) odds at the top of the page.

Prediction-market prices are what traders pay for each outcome on Kalshi, Polymarket, ForecastEx and Crypto.com, read as the market's implied chance. They are not forecasts by 4Conservative, can move fast and can be wrong; they are read every few minutes and may be delayed. Money traded on Kalshi and ForecastEx is estimated from contracts at their price. News comes from the 4Conservative index; prices of stocks, rates and coins from 4Conservative Finance. Nothing here is betting, financial or investment advice. Terms of use. How to use Predictions