Antigravity trial accounts show both Opus 5.5 and Gemini 4 Argon
Google AI Pro trial users reportedly see both Opus 5.5 and Gemini 4 Argon in Antigravity, with demos including 3D wizard chess, a periodic table, and a WebGL fur engine.
OPUS 5.5 AND GEMINI 4 ARGON IN ONE IDE, AND TRIAL ACCOUNTS ARE GETTING BOTH per @k2sbhai, Google AI Pro trial users now see both models inside Antigravity what Argon builds in there, from Google's own team: > a playable 3D Wizard Chess from scratch (video) > a 3D periodic table synced to Tom Lehrer's "The Elements" > a WebGL fur engine running live in the browser check your Antigravity model list before you pay for anything this month
This post quotes another post: “Google AI Pro trial accounts unlock Gemini 4 Argon in Antigravity”