Google rolls out Gemini 4 Argon AI model for developers and subscribers

What happened

Google is rolling out its new Gemini 4 Argon AI model globally as of October 13, 2026 [2]. The model is designed to handle complex scientific, coding, and agentic problems, featuring a 1 million unified input-output token limit [2]. Google reported that its own engineers have used Argon to ship high-quality code faster, helping teams increase agentic code submissions by more than 35% and reduce code rollbacks by nearly a third [2].

In one instance, the team behind Google’s open-source Agent Development Kit (ADK) used Argon to optimize a Python codebase. By providing the model with a rulebook and a goal, the model worked autonomously overnight to surface optimizations that cut in-memory session prep time by 40% in long sessions and increased cold import speeds by 21% [2]. The model also shows improvements in spatial reasoning, mathematical precision, and visual coding compared to previous Gemini models [2].

Who is affected

Access to Gemini 4 Argon depends on specific subscription tiers and roles:

• Developers: Can access the model via the Gemini API paid tier in AI Studio and Android Studio [2]. Through November 30, 2026, API rates are temporarily set at $2 per million input tokens and $10 per million output tokens, with a 95% discount for cached tokens [3]. After this date, rates will increase to $4 per million input tokens and $20 per million output tokens [3].
• Enterprises: Can use the model through Gemini for business, the API, and Google Antigravity [2].
• Antigravity users: Subscribers to the AI Ultra plan can use Argon in Antigravity and AI Studio [2]. While one source notes Argon is rolling out to Antigravity for AI Pro subscribers [1], another source states that in Antigravity and AI Studio, the model is only available for those on AI Ultra plans [3].
• Everyday users: Those with Google AI Ultra or AI Pro subscriptions can use the model in the Gemini app and the AI Mode in Search [2]. The AI Pro plan costs $20 per month, while AI Ultra starts at $99 per month [3].
• Scientists and researchers: Can apply for a chance to receive access to the highest usage tier of Google Antigravity free for six months, subject to selection and capacity [2].

What to do next

• Developers can build with the Gemini API in AI Studio and Android Studio [2].
• Scientists and researchers can submit applications for the six-month free access tier [2].
• Users can try the model in Google AI Studio [2].