OpenAI has historically released major GPT model iterations on varying timelines, from GPT-3 in June 2020 to GPT-3.5 in November 2022 and GPT-4 in March 2023. Each release typically involves extensive research, safety testing, and infrastructure preparation. The prospect of a GPT-5.5 release specifically on April 24, 2026, represents a precise prediction tied to a particular calendar date. This market resolves based on official announcements from OpenAI or credible third-party confirmation of a GPT-5.5 release on that exact date. The current market odds at 2% reflect traders' collective assessment that such a release is highly unlikely within this near-term window. This low probability may indicate traders expect GPT-5.5 to either release on a different date, face delays, or remain in development beyond April 24, 2026. The market remains active through April 30, allowing traders to monitor any official statements or announcements from OpenAI regarding their model release schedule.