Gemini 4 Argon is appearing in more of Google’s product infrastructure. Lumina’s latest findings include Contributor pricing, an AlphaEvolve billing entry and native model IDs in Antigravity’s desktop app and CLI. Together, they suggest preparations for broader access are progressing.
Could that mean a release today, 13 October? It is a plausible reading of the activity, but the entries do not give a launch date. Google’s API release notes still had no Argon launch entry when checked on 13 October.
A Contributor billing tier
The Contributor entry recorded in our Discord lists $2 for input, $0.10 for cached input and $10 for text output, each per one million billing units labelled “count.” Input and cached input cover text, audio, images and video.
Those dollar amounts match Google’s announced introductory token prices, including its 95% cache discount. That makes the listing consistent with the planned launch pricing. The Contributor label alone does not establish a different model or explain any additional conditions attached to that tier.
Argon appears alongside AlphaEvolve
A second card records Gemini Enterprise AlphaEvolve · Gemini 4 Argon under Vertex AI Search in Google Cloud billing. It lists $8 and $40 per million count.
The connection is more specific than a standalone Argon reference: Google’s billing catalog is naming it within AlphaEvolve. It is still billing evidence, however. It does not show which customers can use it, whether a rollout has started, or whether a separate callable model ID exists.
The same model IDs in both Antigravity clients
Our build comparisons record four native identifiers: gemini-4-argon, plus low, medium and high variants. They appear in the CLI comparison from 1.3.3 to 1.3.4, and in the desktop comparison from 2.22.0 to 2.23.0.
These findings go beyond the earlier interface references we covered. Matching IDs across two clients are a concrete sign that Google is preparing the software to recognize Argon. They do not make it selectable by themselves.
Google has already announced Argon and begun phased access for trusted cyber defenders. Its stated next audience includes paying API customers and Google AI Ultra subscribers. The question now is when that wider access opens; the new entries make it worth watching closely, without settling whether today is the day.
Sources & references
- Lumina: Argon billing and Antigravity findings ↗
Lumina’s four findings cards, reproduced in this article. The billing entries and build comparisons do not establish public model access.
- Google: Gemini 4 Argon announcement ↗
30 September 2026. Phased access plans and introductory API pricing.
- Google: Gemini API release notes ↗
Checked on 13 October 2026. The latest listed update was 8 October; no Argon API launch entry was present.
