Agents· 🧪 Worth Testing
Google Antigravity adds Claude Opus 5.5 and Sonnet 5.5 alongside Gemini models
Google Cloud has made Anthropic's Claude Opus 5.5 and Claude Sonnet 5.5 selectable inside its Antigravity agentic coding platform, alongside Gemini 3.8 Flash and Gemini 4 Argon. Developers can switch between model families mid-conversation across Antigravity 2.0, the CLI, and IDE extensions for VS Code, JetBrains and Visual Studio, all under one enterprise billing and security boundary. Google also describes two engineering patterns: using a second model family to independently review code written by the first ('LLM-as-a-judge'), and assigning fast Gemini Flash subagents to handle high-volume mechanical tasks while a stronger model handles deep reasoning.