According to monitoring by the Svmuu Seer channel, the probability on Polymarket that “GPT-5.6 will not be released to the public before June 28” has risen to 78%, a 67% increase over the past 24 hours. In an internal memo dated June 11, OpenAI Chief Scientist Jakub Pachocki described GPT-5.6 as a significant upgrade over GPT-5.5. Analysts believe that previous leaks regarding the Codex backend in May, as well as the rapid iteration pace following the April 23 release of GPT-5.5, have reinforced market expectations of an imminent launch for GPT-5.6. The rules specify that GPT-5.6 includes both models explicitly named GPT-5.6 and models that OpenAI identifies as direct successors to GPT-5.5 (such as GPT-5.7, GPT-5.8, etc.). Task-specific models, cost-optimized versions such as Nano/Mini, and the o-series inference models are not included in the scope of this event; next-generation flagship models such as GPT-6 are also ineligible. Eligible models must be officially available to the public, including through open beta or open waitlist formats. Versions available only through closed beta testing or private access do not meet the settlement criteria. This event will primarily rely on OpenAI’s official announcements and information from its official website as the basis for settlement, supplemented by verification through credible media reports. The Svmuu Seer channel continuously monitors prediction markets to spot changes before prices are set.