Antigravity will remove Claude Opus 4.6 on November 2, and a Pro trial cannot run Opus 5.5

Google's own Antigravity documentation says Claude Sonnet 4.6, Claude Opus 4.6 and GPT-OSS-120b "will be removed on November 2, 2026". The three newer models in the same list, Gemini 4 Argon, Claude Sonnet 5.5 and Claude Opus 5.5, carry a different footnote: they are available "on Google AI Pro for non-trial subscriptions only", so anyone on a free Pro trial cannot run them. Google's own card for its May 19 post on changes to Antigravity plans, which added a second Google AI Ultra tier. Image: Google Count what that leaves. Of the ten reasoning models the page lists, four are flagged for a free account or a Pro trial: Gemini 3.8 Flash, Claude Sonnet 4.6, Claude Opus 4.6 and GPT-OSS-120b.

First reported by MIXED Reality News. This page is a short excerpt; the full text is theirs.