Google ships Gemini 4 Argon worldwide and announces Carbon two weeks later, with Carbon held for U.S. government testing
Google released Gemini 4 Argon, a frontier reasoning model, to developers, enterprises, scientists and consumers in October, then announced Gemini 4 Carbon two weeks later for long-horizon engineering and cybersecurity defense. Argon reached Google AI Studio, the Gemini API, Google Cloud, Search and the Gemini app after early safety testing, with a separate robotics variant; Carbon entered pre-release testing with the U.S. government and trusted cyber defenders in the Fairwind Program before a broader launch.