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Home / Markets / Anthropic + OpenAI vs Microsoft - higher valuation on Decemb
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Anthropic + OpenAI vs Microsoft - higher valuation on December 31?: live odds and probabilities

The market favorite is Microsoft at 82.5%, ahead of Anthropic + OpenAI at 17.5%. $11K traded across 1 markets.

Updated 2026-11-06 02:18 UTC · Source: Polymarket · 18+ · Market prices, not predictions or advice

Favorite

82.5%
Microsoft · Trade →

24h move

+6.5
pts · 7d +8.0

Volume

$11K
24h $0 · liquidity $1K

Closes

January 5, 2027
60 days left

FinancePrivatesDario AmodeiAIBig Tech

Markets for this game

MarketSide ASide BVolume
Anthropic + OpenAI vs Microsoft - higher valuation on December 31?Anthropic + OpenAI 17.5%Microsoft 82.5%$11K

Prices are the Polymarket mid or last trade at 2026-11-06 02:18 UTC. A price of 64¢ implies roughly a 64% chance. Prices include spread and are not forecasts by BetG8.

📱 Compare how the same event is priced across venues on Polymtrade.Referral link. 18+.

Price history

0%25%50%75%100%05-2008-1311-06
MicrosoftAnthropic + OpenAI

Market rules and resolution

This market will resolve to "OpenAI + Anthropic" if the combined private market valuation of Anthropic and OpenAI is larger than Microsoft's market capitalization on December 31, 2026, or to "Microsoft" if Microsoft's market capitalization exceeds that combined valuation. NPM Prices are published for trading days only and are updated once daily at 1:00 PM ET on the following calendar day. If NPM has not published relevant data for the specified date by 1:00 PM ET on January 1, 2027, this market may remain open until 11:59 PM ET on January 4, 2027. If no further data is released by that time, the market will resolve according to the data available. If NPM ceases publishing relevant data prior to the specified date, this market will resolve based on the NPM data published prior to the cessation of coverage, as well as applicable public market capitalization data following an IPO or direct listing. If a private company completes an IPO or direct listing prior to the specified date, this market will resolve according to the company's public market capitalization at the market close of the specified date or the most recent trading day. Public market capitalization will be determined using the final official regular-hour trading price published for the company's primary listed common equity on its primary exchange for the specified date or the most recent trading day, multiplied by the company's total outstanding common shares at the relevant time. If the listed company merges with or acquires another entity and remains the parent company, no change to resolution methodology applies. If a listed company is acquired, merges into another entity and is no longer the surviving parent company, or otherwise ceases to exist as an independent entity prior to the end of the period, only the last NPM valuation and applicable public market capitalization achieved prior to completion of the transaction will be considered for resolution. No transaction, acquisition, or merger consideration will be considered for resolution. The resolution source for this market is NPM data published here (https://fe.secondmarket.com/companies/company-30839e0b-2730-4495-839f-1bf638fa9cca/data?return_url=https://polymarket.com/finance/privates) and here (https://fe.secondmarket.com/companies/company-3e197763-4ff8-4d8c-bd1f-cc2792937757/data?return_url=https://polymarket.com/finance/privates). The resolution source for any period following an IPO,

How to read this market

Each share pays $1 if its outcome happens. Buying Microsoft at 83% risks 83¢ to win 18¢. Prices move with news and order flow, and thin markets can swing on small trades, so check volume and spread before treating a number as the crowd's view. See our guides to implied probability and how markets resolve.

Frequently asked questions

Who is favored in "Anthropic + OpenAI vs Microsoft - higher valuation on December 31?"?
As of November 6, 2026, Microsoft is the favorite at 82.5%, followed by Anthropic + OpenAI at 17.5%.
When does this market resolve?
The market is scheduled to close on January 5, 2027. It resolves under Polymarket's rules once the outcome is known, which can be earlier or later than the listed date.
How much has been traded?
$11K in total and $0 in the last 24 hours, with about $1K of resting liquidity.
Can I trade this market?
Polymarket restricts access by location; the US version (Polymarket US) and the offshore site have different rules and fee schedules. Check availability in your jurisdiction. BetG8 earns a referral fee from the Polymtrade links on this page.

Related on BetG8

Data: Polymarket Gamma and CLOB APIs, fetched by BetG8 at the time shown above. Venues may restrict access by location. 18+ only.