Google made Antigravity, its agentic development environment built around the Gemini 3.5 model line, the official successor to the Gemini CLI as of June 18, 2026 -- the migration deadline for free and AI Pro/Ultra subscribers. Rather than a command-line tool, Antigravity is a full agentic workspace where Gemini plans, writes, and executes coding tasks with the developer supervising.
The move is strategic. The most valuable AI surface for developers is no longer a chat box or a CLI -- it's the environment where agents do real work, and whoever owns that environment owns the workflow and the data exhaust that comes with it. Google is betting that a purpose-built agentic IDE, tightly coupled to its frontier model, beats bolting AI onto existing tools.
“Google is betting that a purpose-built agentic IDE, tightly coupled to its frontier model, beats bolting AI onto existing tools.”
The timing is conspicuous. Days after SpaceX agreed to buy Cursor for $60 billion, Google retiring its CLI in favor of an agentic IDE underscores that the coding workflow is the single most contested battleground in applied AI -- and every major lab wants to own it outright.