Google opens Gemini 4 Argon to developers worldwide and to paid Gemini subscribers

What changed

Google said on 13 October 2026 that Gemini 4 Argon is now available to developers and enterprises worldwide through the Gemini API, AI Studio and Google Cloud.¹² The model had first gone only to cybersecurity defenders in Google’s Fairwind programme at the end of September.¹²

Consumers can use it in the Gemini app and AI Mode in Search if they pay for Google AI Pro or Ultra.¹² Engadget lists AI Pro at $20 a month and Ultra from $100 a month in the US.² Ultra subscribers also get it in Google Antigravity, Google’s agent-based coding tool.¹

Price

Google lists introductory API prices of $2 per million input tokens and $10 per million output tokens, with cached input 95% off.¹ After the introductory period ends on 30 November 2026, prices rise to $4 and $20.¹²

Claims

Google says Argon ranks first on the Vals Index, which covers tasks in finance, coding, law and tax, and scores 87% on the ERQA embodied reasoning test.¹ It also gives a 1 million token limit shared between input and output.¹ These are Google’s own results.

Engadget reports that independent firm Artificial Analysis says Argon matches OpenAI’s GPT-6 Astra on its Intelligence Index, at about 60% of the cost per task at the introductory prices.²

In the Gemini app

Google’s Josh Woodward said Argon answers faster with less hedging and repetition, and can reply while still thinking on longer tasks, Engadget reports.²

India

Google says the API is available globally; it does not give India-specific consumer pricing in the post.¹

What to watch

Prices double after 30 November. Google says the rest of the Gemini 4 family will follow.¹