Antigravity now lists Gemini 4 Argon for paid Google AI Pro plans, not trials
As of October 16, 2026, Antigravity's model table lists Gemini 4 Argon for Google AI Pro on non-trial subscriptions only, alongside Ultra and Enterprise. Free, Google AI Plus and Pro trial users are excluded, and Argon is not available in the Antigravity IDE.
SessionWatcher editorial · Published · Updated · Source announcement: 2026-10-16
Related guide: How to check your Gemini usage
What changed
As of October 16, 2026, the reasoning model table on Google's Antigravity models page marks Gemini 4 Argon as available on Google AI Pro. A note says this applies to non-trial subscriptions only. Before this update, the same table showed Argon as unavailable on Google AI Pro.
Google AI Ultra and Enterprise are still marked as available. Free and Google AI Plus are still marked as unavailable. The page does not say when the change took effect.
Sources: Choose a model
Trials and where Argon runs
Google AI Pro trial users do not get Argon. The model selector on the page now has separate columns for Google AI Pro (Trial) and Google AI Pro (Paid). The page says trial users can submit an upgrade request to switch to a paid Google AI Pro plan.
Argon is marked as not available in the Antigravity IDE. It is available in the Antigravity app, the Antigravity CLI and IDE extensions.
Sources: Choose a model
Limits and how to see usage
The models page does not list Argon rate limits for Google AI Pro. For reasoning model rate limits, it sends readers to the plans page.
The View Usage panel shown on the page has a remaining weekly limit and a remaining five-hour limit for Gemini models. Claude and GPT models have their own separate weekly and five-hour limits.
Sources: Choose a model
AI assisted reporting, checked against the linked official sources. Source pages checked 2026-10-16. Editorial process and corrections.