OpenAI’s September 2026 launch of GPT-6 Astra, its current flagship with expanded context, agentic capabilities, and strong benchmarks in coding and cybersecurity, has reset the release clock after GPT-5 in 2025. Trader sentiment for a GPT-7 release by mid-2027 remains low because the company has issued no official timeline, preview, or internal codename, while recent point releases like GPT-6.1 Sol and GPT-6 Luna show focus on iteration rather than a full generational leap. Historical cadence now points to a second-half 2027 window, with prediction markets assigning roughly 39% probability by June 30, 2027 versus 92% by year-end. Key near-term catalysts include OpenAI’s developer events, Stargate compute scaling updates, and any competitive pressure from models like Claude Opus 5 or Gemini successors that could accelerate frontier training runs.