OpenAI has officially launched GPT-5.5, leading to a significant market reaction. On April 23, the sub-market for GPT-5.5 surged by 25 points, climbing from 61% to 86% in anticipation of the release. Following the confirmation, all active sub-markets, including those for April 30 and June 30, reached 100% Yes, indicating full settlement. The announcement triggered substantial trading activity, with USDC trading volume reaching $342,392 over the past 24 hours. The notional value of open interest stands at $373,497, reflecting a robust market response. Traders who invested in YES shares for the April release are now realizing their returns. As all sub-markets have settled, there is no longer an advantage in opening new positions based on the release date. Market participants are advised to monitor potential impacts on OpenAI's user metrics and any official updates from Sam Altman or the OpenAI Help Center.