Google I/O 2026: Antigravity 2.0 Launches as Full Agent-First Developer Platform with CLI, SDK, and Desktop App

Google Blog·high signal

Google upgraded Antigravity from an agentic coding assistant into a full developer platform at I/O 2026, shipping a new desktop app, a Go-based CLI, and an SDK for self-hosted agent deployments — all optimized for Gemini models. The Antigravity SDK gives developers programmatic access to the same agent harness powering Google's internal products, with cross-platform terminal sandboxing and credential masking built in. This directly threatens Cursor, Replit, and Windsurf by offering a zero-to-production agent stack from the model provider itself.