OpenAI’s rapid rollout of the GPT-6 family in September 2026—starting with flagship GPT-6 Astra on September 3, followed by Sol and Luna variants on September 22 and GPT-6.1 Sol on September 29—has clarified the current generation and reinforced expectations that the next whole-number model, GPT-7, remains well into 2027. No official previews, naming, or documentation of GPT-7 exist in OpenAI channels, with recent analyst estimates pointing to a second-half 2027 window based on the shortened 13-month gap from GPT-5. Traders weigh this accelerated cadence against ongoing Stargate-scale training runs, competitive benchmarks versus Claude and Gemini families, and typical slippage in frontier model timelines when assessing implied probabilities for earlier or delayed releases.