Google announced Gemini 4 Carbon on October 28, 2026, as its strongest frontier large language model, with leading scores on the Artificial Analysis Intelligence Index v5.0 and notable gains in long-horizon coding, agentic tasks, and cybersecurity benchmarks such as vulnerability detection and secure code generation. The company is following the same cautious rollout used for Gemini 4 Argon two weeks earlier, beginning with limited access for a subset of cyber defenders via the Fairwind Program while iterating on guardrails and participating in U.S. government pre-release testing. Broader availability to developers, businesses, and consumers is described as “as soon as possible” without a firm date, though Argon reached general API and app access in roughly two weeks. Traders are pricing near-term public release heavily, reflecting the rapid Gemini 4 cadence and precedent, while noting that extended safety reviews could still shift the timeline.