Gemini CLI reaches 0.66 stable as 0.67 enters preview

Google’s Gemini CLI v0.66.0 is the latest stable release listed on October 27, 2026. The same date's GitHub releases include v0.67.0 in the preview channel. These releases supersede the earlier 0.63.0 stable and 0.64.0 preview versions discussed below; check the channel and version installed before relying on a feature. (https://github.com/google-gemini/gemini-cli/releases)

October 27 stable and preview releases

The official release listing dates stable v0.66.0 and preview v0.67.0 to October 27. This update does not infer feature behavior from the version numbers; review each release's notes and use the stable channel for general installs unless you specifically need a preview change. (https://github.com/google-gemini/gemini-cli/releases)

Stable-release reliability improvements

The v0.63.0 notes also describe bounded tool-output sizes and memory-lifecycle improvements for long-running agent loops, changes intended to reduce memory exhaustion. The release includes fixes for authentication loops involving file contention, headless keyrings, or dropped supervisor state, plus connection-recovery and cleanup improvements. The documented stable installation command is npm install -g @google/gemini-cli. Review unattended plans and tool permissions before allowing an agent to execute a multi-step workflow without an interactive confirmation.

The 0.64.0 preview is experimental

Google’s v0.64.0-preview.0 release is explicitly marked pre-release. Its highlights include serialized file-tool operations with atomic writes and CLI state persistence that can recover from a backup after corruption. It also includes fixes for @file:line references and for cancellation handling during active operations. Google warns that preview releases contain experimental changes and may be less stable than the weekly stable release; install with npm install -g @google/gemini-cli@preview only where that risk is acceptable. (https://geminicli.com/docs/changelogs/preview/; https://github.com/google-gemini/gemini-cli/releases/tag/v0.64.0-preview.0)

Sources

• Gemini CLI — GitHub releases, including v0.66.0 and v0.67.0 (October 27, 2026): https://github.com/google-gemini/gemini-cli/releases
• Gemini CLI — latest stable release notes: https://geminicli.com/docs/changelogs/latest/
• Gemini CLI — v0.63.0 GitHub release: https://github.com/google-gemini/gemini-cli/releases/tag/v0.63.0
• Gemini CLI — preview release notes: https://geminicli.com/docs/changelogs/preview/
• Gemini CLI — v0.64.0-preview.0 GitHub release: https://github.com/google-gemini/gemini-cli/releases/tag/v0.64.0-preview.0
• Google for Developers on X — official developer updates: https://x.com/googledevs