Google’s September 30 announcement of Gemini 4 Argon triggered the current odds, with the model initially limited to vetted cybersecurity organizations via the Fairwind Program and internal teams rather than immediate broad availability. Traders price October 13 highest because Google described the expansion to paid API users, Google AI Ultra subscribers, and eventually developers and enterprises as happening “soon,” consistent with prior frontier-model timelines that moved from tester access to wider release within roughly two weeks. The sizable share on “no release by October 31” and spread across mid-to-late October dates reflect uncertainty around the pace of safety evaluations, tester feedback incorporation, and any additional regulatory pre-release reviews. No new official timeline has emerged since the launch post, leaving the market sensitive to the next Google DeepMind update or enterprise-access announcement.