OpenAI's next-generation large language models are subject to intense market speculation, and GPT-5.5 represents a significant milestone in AI development. The market question asks specifically whether OpenAI will release GPT-5.5 on April 19, 2026—notably, the same day this market snapshot is taken. Current market odds for a YES resolution stand at just 0%, suggesting that traders assign nearly zero probability to such an announcement on this specific date. This low probability reflects the unpredictable nature of AI model release schedules, where timelines shift based on development progress, safety reviews, and business strategy. Market participants typically base such predictions on OpenAI's historical release cadence, public statements from company leadership, technical benchmarks being met, and broader competitive AI development signals. The market resolves on April 30, 2026, providing an 11-day observation window. The near-zero odds indicate either widespread expectation of a later release date, or that most traders believe any April announcement has already passed. For those tracking major AI developments, this market serves as a real-time snapshot of community conviction around OpenAI's release timeline.