Claude Opus 5.5 and Claude Sonnet 5.5 Are Now Available in Google Antigravity
Google, Tuesday, October 20th, 2026
Google Cloud customers can now select Anthropic's Claude Opus 5.5 and Claude Sonnet 5.5 in the Google Antigravity development platform.
Google says Claude Opus 5.5 and Claude Sonnet 5.5 are now available in Google Antigravity for Google Cloud customers.
Claude Opus 5.5 targets complex work, while Sonnet 5.5 is a faster, lower-cost complement.
Once an administrator enables them, developers can pick the models directly from the model picker.
Administrators can also enable Google's Gemini models, including Gemini 3.8 Flash and Gemini 4 Argon.