Manual source - last checked Not checked yet
Market open
May 7, 2026, 06:41 p.m.
Market closes
Oct 27, 2026, 06:41 p.m.
Projected payout
After market closes
Resolves YES if OpenAI publicly releases or announces a model branded as GPT-5 (or confirmed next-generation successor to GPT-4) before Sep 1, 2026. Source: OpenAI official blog
Official announcement or authoritative source