OpenAI has accelerated its GPT-6 family cadence with GPT-6 Astra in early September 2026 followed by Sol and Luna variants on September 22 and GPT-6.1 Sol on September 29 at DevDay, emphasizing efficiency gains, halved API pricing versus GPT-5.6 predecessors, and stronger results in coding, computer use, factuality, and alignment. This rapid iteration, driven by large-scale training and post-cyberattack safeguards, shapes trader views on whether OpenAI will deliver a 6.2+ Sol next or face delays from safety reviews. Competitive pressure from models like Claude Opus 5.5 and benchmark gains in agentic workflows add uncertainty, while upcoming earnings or developer events could clarify timelines for the next Sol-class release.