Gemini 4 Argon Unavailable in Antigravity 2.0 Despite Active Google AI Pro Subscription

Google Antigravity
1

I am writing to report an issue with accessing Gemini 4 Argon in Google Antigravity 2.0 on my Windows 11 computer.

I have an active Google AI Pro subscription, but Gemini 4 Argon is unavailable in my model selector. I expected to be able to access the model based on Google’s published information about its availability for eligible Google AI Pro subscribers.

Could you please clarify the following?

  1. Is Gemini 4 Argon currently available to Google AI Pro subscribers in India using Antigravity 2.0?
  2. Does eligibility differ between directly purchased Google AI Pro subscriptions and subscriptions obtained through promotional or partner offers?
  3. Is there a specific Antigravity version or application interface required to access Gemini 4 Argon?
  4. If my subscription is eligible, could you investigate why the model is unavailable on my account and advise me on how to resolve the issue?

I would appreciate clarification of the applicable eligibility requirements and any necessary troubleshooting steps.

My details:

  • Operating system: Windows 11
  • Application: Google Antigravity 2.0
  • Subscription: Google AI Pro
  • Issue: Gemini 4 Argon is unavailable in the model selector

I have provided the screenshot of the model selector:

Screenshot 2026-10-18 131741
Screenshot 2026-10-18 1317411920×1140 129 KB

Thank you for your time and assistance. I look forward to your response.

Kind regards,
A Google AI Pro subscriber,
SoundTrackMaster.

2

Hi @SoundTrackMaster,

Thank you for reaching out.

Here are the answers to each of your questions:

  1. Availability in India: Yes, India is a supported country (Geographical availability FAQ), and Gemini 4 Argon is available to eligible paid (non-trial) Google AI Pro and Google AI Ultra subscribers in India.
  2. Directly Purchased vs. Promotional or Partner Subscriptions: Yes, eligibility differs. Gemini 4 Argon, Claude Sonnet 5.5 (thinking), and Claude Opus 5.5 (thinking) are available on Google AI Pro for paid (non-trial) subscriptions only. Free trials, device promotions, and partner-bundled memberships (such as Jio) are provisioned as promotional plans and do not include Gemini 4 Argon or Claude 5.5, which is why your screenshot shows the Notice badge next to the 4.6 models and Unavailable next to Gemini 4 Argon.
  3. Supported Application Interfaces & Versions: Gemini 4 Argon is supported in the Antigravity App (latest version v2.24.0, listed in the Changelog), **[Antigravity CLI (v1.4.2)] and Antigravity IDE extensions. It is not available in the standalone Antigravity IDE (v2.5.5).
  4. How to Resolve:
    • If your subscription is through a trial, promotion, or partner offer: To unlock Gemini 4 Argon and Claude 5.5, you can switch from a promotional/trial plan to a paid Google AI Pro subscription by submitting an upgrade request.
    • If your subscription is directly billed (non-trial): Ensure your Antigravity App is updated to v2.24.0 (Changelog), sign out of Antigravity completely, and sign back in to refresh your subscription status.

Please let us know if you need any additional information.