Google announced Gemini 4 Argon on September 30, 2026, as its new flagship model after abandoning plans for the long-delayed Gemini 3.5 Pro. The larger model targets frontier performance in coding, long-horizon software engineering, enterprise tasks, and cybersecurity, with initial limited access to select partners through the Fairwind Program while post-training, safety evaluations, and guardrails continue. Broader developer and consumer availability is planned as soon as possible, amid competitive pressure from OpenAI and Anthropic releases. This phased approach reflects Google's emphasis on reliability and regulatory alignment before wider deployment.