Gemini 4 Argon shipped for paying users: the paid API tier, and in the app only for Pro and Ultra

The facts: on October 13, 2026 Google released Gemini 4 Argon globally. By Google's announcement, access works like this: for developers and enterprises through the API in AI Studio and the Gemini platform, where for developers it is the paid tier of the Gemini API in AI Studio and Android Studio; for Google AI Ultra subscribers in Google Antigravity; for Google AI Ultra and Pro subscribers in the Gemini app and in AI Mode in Search. At the end of the announcement, enterprises also get the model in Gemini for business and in Google Antigravity. The model launches at an introductory price of $2 per million input tokens and $10 per million output tokens, with cached input tokens at 95% off. The limit is 1 million tokens combined for input and output through the Gemini API, and Google points to its documentation for a new continuation protocol. By Google's account Argon ranks first on the Vals Index, and in Antigravity its teams increased agentic code submissions by more than 35% while cutting code rollbacks by nearly a third. For cyber defenders, Google is beginning to expand the Fairwind Program to hundreds of additional partners; those accepted into the program get access to Argon without cyber guardrails, on a rolling basis. 10,000 scientists can get the highest usage tier in Google Antigravity free of charge for 6 months, subject to eligibility, capacity and selection.