Can I use Gemini 4 Argon in Google AI Mode?

Yes — as of October 13, 2026, Google AI Pro and Ultra subscribers can select Gemini 4 Argon from the model menu (the '+' icon) in AI Mode's "Ask anything" bar; it's an added option, not the default.

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Search Engine Journal · Oct 13 Oct 13 Google Search

Google adds Gemini 4 Argon to AI Mode's model menu

Q: What model does Google AI Mode use by default?

A Flash-class Gemini model remains AI Mode's default, which Google uses to keep responses fast and costs down at search scale; Argon is a selectable alternative for subscribers, not a replacement.

Google has added Gemini 4 Argon as a selectable model inside AI Mode’s “Ask anything” bar, reachable via the menu’s ”+” icon, per Search Engine Journal. The option is rolling out globally to Google AI Pro and Ultra subscribers; Google says it improves handling of multi-step tasks and back-and-forth instructions. It’s additive, not a replacement — AI Mode’s default remains a Flash-class model, which Google uses to keep responses fast and costs down at search scale.

Why it matters: AI Mode's first model picker lets Google test whether subscribers will trade its default cost-and-speed tradeoff for a more capable model on complex queries, rather than Google choosing one model for everyone.

The record: Google AI Mode Gemini Google

Glossary: AI Mode

Via Search Engine Journal ↗

Posted to the wire October 13, 2026. Edited by Joe Balewski.

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