From the source

Gemini 4 Argon begins rolling out in Gemini app and Antigravity, but only if you pay

Rollout begins for paying users only, with tiered access restrictions.

Availability change

Google is rolling out Gemini 4 Argon to paying users in the Gemini app and Antigravity, with full access limited to AI Pro ($20/mo) and AI Ultra (starting at $99/mo) subscribers.

In Antigravity and AI Studio, only AI Ultra users can access the new model.

API pricing is temporarily $2 per million input tokens and $10 per million output tokens, rising to $4 and $20 respectively after November 30.

From the source
Argon is beginning its wide rollout today, but it’s only coming to paying users at this time, and even those on lower-tier plans won’t have full access.
arstechnica.com

Announced: 13 Oct 2026 16:00 UTC
Detected: 13 Oct 2026 16:10 UTC (+10m after)
Pricing: Pricing is temporarily set at $2 per million input tokens and $10 per million output tokens, with a 95 percent discount for cached tokens. This deal is only good through November 30, at which time the rate will jump to $4 per 1M input tokens and $20 per 1M output tokens.

ModelsGemini 4 Argon

Visit source ↗arstechnica.com

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Gemini 4 Argon begins rolling out in Gemini app and Antigravity, but only if you pay

From the source