OpenAI has established a consistent pattern of releasing major model iterations and enhancements. Most recently, the company released GPT-4 and subsequent versions like GPT-4 Turbo at intervals measured in months to years, with significant development time between major numbered releases. The prediction market on GPT-5.5 release by April 22, 2026, represents traders' expectations about the specific timing of the next major model announcement from OpenAI. At just 1% implied probability, the market consensus strongly suggests this exact release date is highly unlikely, reflecting widespread skepticism about OpenAI announcing a major new model version within the next five days. The resolution criteria is straightforward and verifiable: if OpenAI officially announces or releases GPT-5.5 on or before April 22, 2026, the YES outcome occurs; otherwise, the market resolves NO. This prediction market closes on April 30, providing a one-week grace period beyond the target date for final resolution confirmation. The 1% odds have remained relatively stable and flat throughout the market's trading period, indicating persistent market belief that an April 22 release falls significantly outside OpenAI's typical product development and public announcement timeline. Traders interested in this market can track OpenAI's official blog, press releases, and social media channels through the final resolution date.