The GPT-5 race represents one of the most competitive frontiers in artificial intelligence development. These prediction markets track which company will achieve the most advanced large language model by the end of June 2026, drawing interest from AI enthusiasts, technology investors, and those following the rapid evolution of AI capabilities. The markets featured here focus on major AI organizations—including Alibaba, Meituan, Mistral, Z.ai, and Baidu—each competing to develop leading-edge models. Common questions include: Will OpenAI maintain its lead? Can international players like Alibaba or Baidu catch up? Will Mistral's open-source approach yield competitive results? These markets reflect genuine uncertainty about which technical approaches, resource investments, and research teams will produce the most capable systems. Several factors typically influence these predictions. Public benchmark releases—such as MMLU, GSM8K, or specialized reasoning tests—provide concrete performance data that markets respond to immediately. Model announcements from companies, whether confirming development timelines or revealing unexpected breakthroughs, shift probability significantly. Competitive dynamics also matter: markets consider each player's track record, funding, research talent, and historical release velocity. Beyond raw capability claims, markets weigh accessibility and real-world deployment. A model that's theoretically advanced but restricted in availability may score lower than one that's widely accessible. Similarly, breakthroughs in specific domains—reasoning, coding, multimodal understanding—create ripple effects across different market predictions. These markets reflect genuine uncertainty about the future of AI development, with prices shifting as new evidence emerges.