Google Antigravity Adds Opus 5.5 and Sonnet 5.5 Support

On October 3, 2026, a user post on V2EX reported that Google Antigravity now supports Opus 5.5 and Sonnet 5.5. According to the post, the two models are available only to paying Pro and Ultra subscribers. The same post said the existing 4.6 models will be removed in November.

The poster also named three groups left out of this rollout: India Pro users, student Pro users, and Pixel Pro users. In the poster's words, those accounts will have only 哈吉米 to work with from now on, and the poster added that it is not yet known whether they will eventually be given access to 哈吉米 4 Pro either.

The report carries no official confirmation. The material contains no Google announcement, no support page, and no notice spelling out account eligibility, so the claim that Antigravity supports Opus 5.5 and Sonnet 5.5, the plan to retire the 4.6 models in November, and the exclusion of India Pro, student Pro, and Pixel Pro users all rest on this single user post. As a result, the exact scope of the new model support, the precise timing of the 4.6 removal, and whether any of the excluded groups will be added later remain unverified. Nothing in the material says what prompted the change, or how the affected users have responded to it.