Google’s September 30 announcement of Gemini 4 Argon, its new frontier large language model with 1M-token output limits and strong benchmarks in long-horizon coding and cybersecurity defense, drives the current market. The model entered a controlled Fairwind Program rollout to vetted cyber defenders and internal teams first, with explicit plans for rapid expansion to paid API customers and Google AI Ultra subscribers “as soon as possible” after safety feedback. Traders assign the highest implied probability to an October 13 broader release because the company has signaled an expedited, phased timeline amid competitive pressure, though the absence of a firm date and emphasis on guardrails leave room for short delays into late October.