Gemini CLI

Google's open-source terminal agent (now secondary to Antigravity CLI).

Google · open source · checked Oct 22, 2026

What it is

Gemini CLI is an open-source terminal agent (Apache-2.0). Per its docs, for unpaid tier and Google One users it was replaced by Antigravity CLI on June 18, 2026, and it is not optimized for Gemini 4 Argon.

Use cases

→Existing Gemini CLI scripts and extensions
→Paid Gemini API users who prefer it

Pros

+Open source with extensions ecosystem
+Still updated (v0.65.0, Oct 20, 2026)

Cons

−Google now points users to Antigravity CLI
−Not optimized for Gemini 4 Argon

Where it ranks

#8 Best Coding Agents & CLI Agents
Still maintained, but Google now steers free users to Antigravity CLI.

On the Release Radar

Gemini CLI v0.65.0

Stable release that enforces read-only workspace settings in untrusted folders, fixes session-resume bugs (duplicate tool turns, lost history on quick exit), aligns OAuth callback validation with RFC 9207, and adds custom OTLP headers for telemetry.

Verdict: Gemini CLI users who resume sessions or open untrusted repos; others can update at leisure.

Maybe Gemini CLI Gemini CLI releases (GitHub) Oct 20, 2026

FAQ

How much does Gemini CLI cost?

Open source. Free-tier access moved to Antigravity CLI; use with a paid Gemini API key otherwise. Check pricing. (As checked on 2026-10-22; confirm on https://geminicli.com/docs/.)

What is Gemini CLI best for?

#8 in Best Coding Agents & CLI Agents: Existing Gemini CLI users.

What are the best alternatives to Gemini CLI?

Google Antigravity (Google's agent-first IDE, app and CLI); Claude Code (Anthropic's agentic coding tool for terminal, IDE and cloud); OpenAI Codex (OpenAI's coding agent across CLI, IDE, desktop and cloud).

Is Gemini CLI open source?

Yes, Gemini CLI is open source (or has an open-source core).