Gemini 4 Argon paid API half price through Nov 30 at $2 input and $10 output per 1M tokens
Google's flagship reasoning model Gemini 4 Argon is half price on the paid Gemini API through November 30, 2026 — $2 per million input tokens and $10 per million output tokens (including thinking). From December 1 it returns to $4 / $20. Not available on the Free tier or Google AI Pro; you need paid API access (AI Studio paid, Vertex, or OpenRouter).
The briefing
What you get
Gemini 4 Argon is Google's flagship reasoning model for hard coding, math/science work, and multi-step agents. It supports long context, up to about 1M output tokens in one response, and multimodal inputs.
On the paid Gemini API (Google AI Studio paid, Vertex, and similar), pricing is half off through November 30, 2026: $2 per million input tokens and $10 per million output tokens including thinking. From December 1, 2026 it goes back to $4 input and $20 output.
It is not available on the Free tier or the Google AI Pro plan. OpenRouter lists the same model at google/gemini-4-argon with the half-price badge.
How to use
- Open Google AI Studio or the Gemini API and make sure the account is on paid usage.
- Pick model
gemini-4-argonand bill at the official rates. - Or call
google/gemini-4-argonon OpenRouter with your OpenRouter balance.
See Gemini API pricing (Gemini 4 Argon), Google AI Studio, and the OpenRouter model page.