Gemini CLI announces retirement on June 18: Google moves to closed-source Antigravity

Google announced that the Gemini CLI will be officially retired on June 18, 2026, and users will need to migrate to the new Antigravity CLI. This change means that the AI terminal tools used by developers will lose their open source features and instead adopt a new architecture based on the Chrome DevTools Protocol and sandbox security mechanisms. For practitioners who rely on CLI tools for AI automation development, this is a critical juncture in re-evaluating the tool stack.

Core conclusion

Google officially announced that Gemini CLI will officially cease service on June 18, 2026**, and users will need to migrate to the new version of Antigravity CLI. This change brought three core changes: the code base was converted from Apache 2.0 open source to closed source, the underlying architecture was switched from ordinary Node.js to a sandbox mode based on Playwright + Chrome DevTools Protocol, and a new macOS security isolation system.

For developers and creators who use AI CLI tools for automated coding, content production, and agent orchestration, this means that they need to evaluate tool alternatives or become familiar with the Antigravity CLI access method in advance.

Key Points

Time of incident: 2026-05-20 (announced by Google), 2026-06-18 (officially deactivated) -Affected objects: All developers and content automation practitioners using Gemini CLI
Core changes: Gemini CLI (open source) → Antigravity CLI (closed source), comprehensive reconstruction of the architecture

Background and trigger events

Google announced Gemini CLI’s end-of-life plans on its official developer blog. Gemini CLI was originally an open source (Apache 2.0) AI terminal tool launched by Google, allowing developers to directly call the Gemini model on the command line for coding assistance and Agent tasks. The new version of Antigravity CLI is released independently on GitHub in a new repository (google-antigravity/antigravity-cli).

The response from the HN community was mixed - 237 points and 62 comments, including voices of approval of Gemini CLI and complaints about the initial stability issues of Antigravity CLI. Some users reported that Antigravity currently has a "buggy mess" problem, especially in terms of network permissions and sandbox mode usage experience.

Key Impact (by Dimension)

Dimensions	Change	What it means to us	Recommended actions
Open source	Gemini CLI (Apache 2.0) → Antigravity CLI (closed source)	Unable to modify and audit the code by yourself, relying on Google for maintenance	Evaluate open source alternatives, such as Claude Code, OpenClaw
Architecture	Ordinary CLI → Playwright + CDP Sandbox	Stronger execution capabilities (can control the browser), but higher resource overhead	Test performance under different hardware
Security	New macOS Seatbelt Sandbox	Improves isolation security, but also increases configuration complexity	Be familiar with --sandbox configuration and network permission management in advance
Usability	Brand new tool chain with many initial bugs	May be unstable during the migration window	Keep the old version until June 18 and test the new version simultaneously

Adaptation suggestions

Short term (until June 18)

Continue to use Gemini CLI in existing workflows without emergency migration
Parallel test whether Antigravity CLI meets daily needs
Document current custom configurations and script integration methods in Gemini CLI

Mid-term (after June 18)

If Antigravity CLI is stable, complete migration
If you have concerns about closed source, evaluate open source alternatives
Adjust steps in the CI/CD pipeline that rely on Gemini CLI

Alternative Reference

Claude Code (Anthropic): A mature open source coding Agent CLI that supports native code execution and multi-step Agent tasks
OpenClaw: Community-driven open source AI Agent framework for automated workflows
DeepClaude (DeepSeek + Claude Code combination): obvious cost advantage, API fee can be saved by 90%

Related extended information

Tool entry (trigger tool floating card)

Claude Code, OpenClaw, DeepSeek, Gemini, Gemini CLI, Claude

Internal link guidance

Looking for a cost-effective and efficient alternative? Watch: Claude Code + DeepSeek V4 Building Tutorial: API Fees Dropped by 90% (15 Minutes)
If considering Claude Code as an alternative: Claude Code automated writing practice: build an AI content production pipeline in 30 minutes
Real case: Someone used Claude Code to start a business in 48 hours: Claude Code 48 hours to start a business: one person + US$29 monthly fee, monthly income in 3 months $9,000