Antigravity will drop the Claude 4.6 models on November 2, leaving trial users one model
Google's coding tool Antigravity will remove Claude Sonnet 4.6, Claude Opus 4.6 and GPT-OSS-120b on November 2, according to its model documentation. For anyone on a free Google AI Pro trial, that leaves very little.
Google's own card for its May 19 post on changes to Antigravity plans, which added a second Google AI Ultra tier. Image: Google
The newer models, Gemini 4 Argon, Claude Sonnet 5.5 and Claude Opus 5.5, are only available on paid Pro subscriptions, not trials. Of the ten models listed, four are open to free or trial users, and three of those are the ones being removed. After November 2 a trial user is left with Gemini 3.8 Flash.
The announcement didn't mention trials
When Google brought Gemini 4 Argon to Antigravity on October 13, it said the model was rolling out to Google AI Pro and Ultra subscribers, with nothing about trials. The documentation is stricter and sends trial users to an upgrade form. The plans page doesn't mention trials either.
The Antigravity App as Google shows it on its own site, with Google's description of it. Image: Google
The page's plan selector draws the same line. It separates paid Pro from trial Pro, and it shows the two Claude 4.6 models for trial users but not for paid Pro, something the main table does not spell out.
Three more Gemini models, 3.7 Flash, 3.6 Flash and 3.1 Pro, are listed for Gemini Enterprise only. Gemini 3.8 Flash is the one model offered on every plan.
The Antigravity CLI, one of the places Google's documentation says Gemini 4 Argon runs. Image: Google
Argon's price changes too
Argon's introductory API price ends on November 30, after which Google charges $4 per million input tokens and $20 per million output tokens. Antigravity's pages give no subscription prices.
Argon runs in the Antigravity app, the command-line tool and the IDE extensions, but not in the Antigravity IDE itself. Google has not announced the model changes, so the list could still shift before November 2.
