Google announced Gemini 4 Carbon on October 28 as its strongest frontier large language model, emphasizing state-of-the-art gains in cybersecurity benchmarks and long-horizon agentic tasks. The model follows the exact staged rollout used for Gemini 4 Argon, which reached general availability to developers and consumers roughly two weeks after initial defender access. Carbon is currently limited to a subset of vetted cyber defenders through the Fairwind Program while Google iterates on guardrails and participates in voluntary U.S. government pre-release testing. Traders have priced the November 9–15 window highest at 64 percent because that interval aligns with the prior cadence and the “as soon as possible” language in the official announcement, while earlier slots remain low-probability given the deliberate safety process.