Google announced Gemini 4 Argon on September 30, 2026, as its new frontier large language model optimized for long-horizon tasks in software engineering, enterprise knowledge work, and cybersecurity defense. It first rolled out in limited form to vetted participants in the Fairwind Program, emphasizing safety guardrails and phased access after prior delays in the Gemini lineup. On October 13, 2026, Google expanded availability globally through the Gemini API at introductory pricing, the Gemini app for Pro and Ultra subscribers, AI Mode in Search, and the Antigravity coding interface. The model leads benchmarks such as DeepSWE v1.1 at 77.9% and the Vals Index, outperforming recent rivals from OpenAI and Anthropic on complex multi-step workflows. Upcoming factors include the end of launch pricing after November 30 and further enterprise integrations.