Anthropic or OpenAI: higher IPO closing market cap?

Polymarket traders put "Anthropic or OpenAI: higher IPO closing market cap?" at 70.0%. Down 1.5%p from yesterday. It resolves on Dec 31.

Most likely right now
Anthropic or OpenAI: higher IPO closing market cap?
1.570%
EconomyVol -Total volume $9Liquidity $2.7Kin 2.4 years (Dec 31)
Current probability

Aug 26 · right column is the 24-hour change (pp)

0%50%100%
Anthropic or OpenAI: higher IPO closing market cap?
70.0%
1.5

Probability over time

Anthropic or OpenAI: higher IPO closing market cap?
02550751008/258/26
2026-08-25 ~ 2026-08-26 · y-axis %

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Probabilities are Polymarket trade prices, formed by participants betting real money. They are not official forecasts and are a poor basis for investment decisions.