Google's September 30 announcement of Gemini 4 Argon triggered the current market positioning, with the model already powering internal workflows and rolling out in limited form to vetted cyber defenders via the Fairwind Program. This phased approach—driven by safety guardrails, U.S. government pre-release reviews, and feedback collection—explains why traders assign the highest implied probability (47.5%) to release on or prior to October 8, while spreading remaining odds across late October dates for broader API or Google AI Ultra availability. The 1M-token output limit, strong DeepSWE and cybersecurity benchmarks, and emphasis on complex enterprise workflows support expectations of rapid iteration, yet the lack of a firm public timeline and focus on controlled expansion keep "no release by October 31" at 13.3% as a hedge against delays.