Google Antigravity CLI Arrives as Gemini CLI Shuts Down
TL;DR
Google Antigravity CLI officially replaces Gemini CLI today, cutting off free users immediately. An Apache 2.0 open-source tool absorbed into a closed platform, completing the fully proprietary AI coding tool market.
Google Antigravity CLI officially replaced Gemini CLI today, June 18. Free users, Google AI Pro/Ultra subscribers, and Gemini Code Assist individuals lose access immediately. Enterprise license holders are unaffected. What started as an Apache 2.0 open-source release just over a year ago ends today as a closed-source platform.
Gemini CLI’s Short Life
Google released Gemini CLI as open source in early 2025, generating an active GitHub community. Developers contributed patches, agent extensions, and workflow tooling over the following months. The source code was publicly available under the Apache 2.0 license.
Today it is not. The community contributions went into the foundation of Antigravity CLI, the closed-source replacement. On GitHub, several contributors were direct about it: features they spent time fixing became part of a closed-source commercial product.
Google’s official reasoning: user workflows have outgrown Gemini CLI’s single-agent design, and multi-agent coordination requires a shared backend architecture. The case for upgrading the tooling is coherent. The case for closing the source is not addressed.
What Antigravity CLI Actually Changes
Antigravity CLI is rewritten in Go and noticeably faster. The more meaningful shift is async multi-agent support. The old tool ran one agent at a time in a blocking terminal session. The new one queues background tasks, letting large refactors or cross-file searches run without locking the terminal.
For developers running complex agent workflows, this is a genuine improvement. The practical caveat is feature parity: Google’s own documentation acknowledges Antigravity CLI will not have 1:1 coverage of Gemini CLI features at launch. Some capabilities will be temporarily absent. Individual users will also encounter weekly usage limits that enterprise accounts do not face, a point several GitHub issues have flagged since the announcement.
The AI Coding Tool Market Is Now Fully Proprietary
The three-month consolidation sequence is worth mapping. SpaceX acquired Cursor for $60 billion last week. OpenAI holds Windsurf. Anthropic built Claude Code as a closed ecosystem. Microsoft controls GitHub Copilot. Google’s Antigravity closes the last gap.
The current roster: Microsoft, Google, Anthropic, OpenAI, SpaceX. One major AI coding tool each, all closed source. The open-source window that Gemini CLI briefly represented closed today. Going forward, the choices available to developers in their own tooling environment will be found inside one of those five ecosystems.
According to the Google Developers Blog, the consumer-tier cutover is immediate. The Register covered the controversy around open-source contributions being absorbed into a closed-source successor.
Related: SpaceX Acquires Cursor for $60B · OpenAI Codex/Windsurf Acquisition · AI Coding Pricing War
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