Gemini CLI Is Shutting Down: Antigravity CLI Migration Guide 2026 and CodeFast Alternatives
On June 18, 2026, Google shut down consumer Gemini CLI and Gemini Code Assist access and moved focus to Antigravity 2.0 and Antigravity CLI. This guide covers the shutdown timeline, migration steps, enterprise exceptions, and CodeFast Gemini, Open Source API, and other package alternatives for terminal-based agentic coding.
Google announced the move from Gemini CLI to Antigravity CLI at Google I/O on May 19, 2026. The official rationale is clear: the terminal is a great agentic interface, but in 2026 developers want multiple agents talking to each other and asynchronous workflows — not a single agent. That is why Google shut down consumer Gemini CLI and Code Assist surfaces on June 18, 2026 and redirected all energy to Antigravity CLI, which shares the same harness as the Antigravity 2.0 desktop app.
This is not a "model shutdown"; it is consolidation of Google's terminal coding product strategy. Gemini models continue to live through the API. What changed is which tool provides consumer-level access to those models. Enterprise customers keep Gemini CLI and Code Assist access.
JavaScript must be enabled for the current interactive version of this page.