Google announced Gemini 4 Carbon on October 28, 2026, as its latest frontier large language model with state-of-the-art performance in cybersecurity tasks such as vulnerability detection and long-horizon agentic coding. The company is following a deliberate, phased rollout that began with limited access for select cyber defenders through the Fairwind Program while completing U.S. government pre-release testing and guardrail refinements. This approach mirrors the timeline for Gemini 4 Argon, which reached general API and product availability roughly two weeks after its own announcement. Traders have priced the November 9–15 window at 75 percent implied probability based on that precedent and the absence of reported delays, with November 16–22 as the next most likely outcome at 15.7 percent. Broader developer and consumer access via the Gemini API or consumer products remains the key near-term catalyst.