OpenAI’s GPT-5.5 officially released, April markets resolve YES

OpenAI’s GPT-5.5 is officially out. The market for GPT-5.5 released by April 30, 2026, sits at 100% YES.

The April 23 sub-market saw a 25-point spike, jumping from 61% to 86% in a single move. All active sub-markets, including April 30 and June 30, are now at 100% YES. The market had been pricing in a likely release, but confirmation still drove heavy action.

Combined USDC volume in the last 24 hours across these markets was $342,392. Face value of open interest is $373,497, and the order books are thick, requiring thousands of dollars to move the price even 5 points.

Traders who bought YES on an April release are now collecting payouts. With all sub-markets resolved at 100%, there’s no remaining edge for new positions on release timing.

Watch how GPT-5.5 affects OpenAI’s user metrics. Official statements from Sam Altman or updates in OpenAI’s Help Center could signal where the user base is headed. Changes in paid user figures or new partnerships may move related markets.

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