Next GPT Terra (5.7+) released on...?

This market will resolve according to the calendar date (ET) on which OpenAI's next GPT Terra model (5.7+) is made available to the general public. A qualifying model must have a name or model identifier that includes "GPT" and "Terra" and be designated as version 5.7 or higher, regardless of capitalization or surrounding prefixes, suffixes, dates, or descriptors. For example, a version 5.7 or higher named in the same manner as GPT-5.6 Terra would qualify, including a new whole-number generation such as GPT-6 Terra or an Astra-branded release meeting these criteria, while models whose name does not include "Terra" or which retain a version designation below 5.7, such as GPT-5.6 Terra, GPT-5.6 Sol, or GPT-5.6 Luna, will not qualify. Fine-tunes, modes, or restricted-access variants of an existing version, such as GPT-5.6-Cyber or GPT-5.6 Sol Ultrafast, will not qualify. A qualifying model must be launched and publicly accessible, including via open beta or open rolling waitlist signups. A closed beta or any form of private access will not suffice. The release must either be clearly defined and publicly announced by OpenAI as accessible to the general public, or otherwise be made publicly accessible and explicitly labeled on the company's official website. … (condensed)