OpenAI's GPT-5.5 has been officially released. The market positioning of GPT-5.5 is as of April 30, 2026.100%Yes.
On April 23, this sub-market surged by 25 points, rising from 61% to 86%. All active sub-markets, including April 30 and June 30, are now at100%Yes. The market had already anticipated the announcement, but confirmation of the news still triggered significant trading activity.
Over the past 24 hours, the total trading volume of USDC across these markets was $342,392. The notional value of open interest is $373,497, and the order book is very deep, requiring thousands of dollars to move the price by even 5 ticks.
Traders who bought YES shares at the April release are now claiming their returns. Since all sub-markets have been fully settled at 100%, there is no longer any advantage to opening new positions based on the release date.
Closely monitor how GPT-5.5 impacts OpenAI’s user metrics. Official statements from Sam Altman or updates from the OpenAI Help Center may signal future trends in the user base. Changes in the number of paying users or new partnerships could affect related markets.