Gemini CLI Is Dead: What to Use Instead and How the Antigravity Transition Works

Google killed the Gemini CLI on June 18, 2026. Here's the gemini cli shutdown alternative path, the Antigravity migration, and who should pick Claude Code.

Gemini CLI Is Dead: What to Use Instead and How the Antigravity Transition Works

On June 18, 2026, Google stopped serving requests from the Gemini CLI and IDE extensions for AI Pro, Ultra, and the free Gemini Code Assist for individuals tier. New GitHub installs were blocked from new orgs the same day. If you're searching for a gemini cli shutdown alternative, the short answer is: move to Antigravity CLI if you want to stay inside Google's stack, move to Claude Code if you want something that isn't tied to Google's roadmap, or stay put on the enterprise tier if you're already paying for it.

This piece covers who's affected, what Antigravity CLI actually is, the migration steps, and why a lot of marketing and dev teams are using this moment to switch to Claude Code instead.

What exactly shut down on June 18

Google didn't kill everything at once. Here's the actual scope of the shutdown:

AI Pro tier: CLI and IDE extension requests stopped on June 18, 2026.
Ultra tier: Same date, same shutdown.
Free Gemini Code Assist for individuals: Stopped serving on June 18.
GitHub installs: Blocked from new orgs the same day.
Enterprise tier: Unaffected. Still works as before.
Existing in-flight requests: Phasing out over the following weeks rather than cutting off instantly.

If your team is on the enterprise plan, you can keep going. Everyone else has to move.

What Antigravity CLI is and isn't

Antigravity CLI is Google's replacement. It's a Go-based, closed-source tool that uses the same architecture as the Antigravity 2.0 desktop app. The pitch is faster execution and async workflows, meaning you can fire off a task, walk away, and have the result waiting when you come back.

A few honest things about it:

It's closed source. The old Gemini CLI was open-source. That trade is real.
It's faster in benchmarks Google has published, particularly for multi-step agentic tasks.
Async workflows are the headline feature. You can queue long-running tasks without holding a terminal session open.
It uses the same model family as Gemini 2.5 Pro and the newer Gemini 3 variants.
It integrates tightly with the Antigravity 2.0 desktop app, so if you're using both, context carries over.

If your workflow is "I want to keep writing code with a Google model and I don't care about open source," Antigravity CLI is a clean migration. If you cared about the open-source posture or you've been considering moving off Google entirely, this is the moment.

How the Antigravity CLI migration works

For teams staying inside Google, here's the path:

1. Install Antigravity CLI. It's a single Go binary. Pull it from the official Antigravity download page tied to your Google Cloud account.

2. Authenticate with your existing AI Pro, Ultra, or Enterprise credentials. Antigravity uses the same auth flow as your Gemini account.

3. Migrate your config. The CLI accepts the same .gemini directory format for now, with a deprecation window into Q4 2026.

4. Update CI scripts. Anywhere you called gemini in scripts, switch to antigravity. The flag syntax is similar but not identical; the --prompt flag is now --task, and the --model flag accepts Antigravity-specific names.

5. Test the async queue. This is the new piece. If you're not using async workflows, you're leaving most of the upgrade on the table.

Plan a half day for the switch on a small project. Plan more if you have a heavy CI pipeline that calls Gemini in multiple places.

Why a lot of teams are picking Claude Code instead

Claude Code is the strongest gemini cli shutdown alternative for teams that don't want to be locked to Google. A few reasons we keep seeing this play out:

Model independence. Claude Code runs on Anthropic's Claude family (Sonnet 4.6, Opus 4.8, Haiku 4.5 as of June 2026). You're not betting on Google's roadmap or their willingness to keep a CLI alive.
MCP ecosystem. Claude Code uses the Model Context Protocol, which is now an open standard with hundreds of connectors. You can wire Claude Code into Google Workspace, Slack, HubSpot, Linear, your own internal APIs, anything with an MCP server.
Strong writing capability. For marketing teams that use a CLI for both code and content, Claude is generally the stronger writer. Google has closed the gap on coding but Claude still leads on nuanced prose.
Enterprise admin. Anthropic shipped Okta-managed MCP connectors in June 2026. If you're an IT-led org, this matters.
Stable pricing posture. Anthropic hasn't shut down a tool tier the way Google just did. That's not a guarantee about the future, but it's a relevant data point.

The migration from Gemini CLI to Claude Code is more work than the Antigravity move because the command structure is different. Plan a full day for a small project, more for a complex one.

Who should pick what

Here's the decision framework we use with clients:

Stay on enterprise Gemini if: You're already paying for it, your team is heavily invested in Vertex AI, and your workflows lean into Google Cloud distribution.
Move to Antigravity CLI if: You were on AI Pro or Ultra, you like the Google model family, and you want the lowest-friction migration.
Move to Claude Code if: You want model independence, you're heavy on MCP integrations, you care about open standards, or you write a lot of content alongside code.
Move to a hybrid setup if: You have a large team. We see a lot of orgs running Claude Code for the primary engineering work and Antigravity CLI for Google-specific workflows like BigQuery and Vertex.

There's no universally correct answer. There's only the answer that fits your existing stack and your tolerance for vendor lock-in.

What this signals about Google's roadmap

The shutdown is worth reading as a signal. Google had two CLI products serving the same audience: Gemini CLI and Antigravity CLI. They picked the closed-source one. They killed the free tier for individuals. They kept the enterprise tier untouched.

The pattern is the same one Google has run in other product categories. Free tiers exist to seed adoption. Once adoption is real, the free tier closes and the paid product gets the investment. This doesn't make Google wrong; it makes them predictable. Build your stack with the assumption that this pattern will repeat.

What we'd do this week

If you're affected by the shutdown and you're trying to move fast:

1. Audit every script, CI job, and developer machine that called gemini. Make a list.

2. Decide on Antigravity CLI vs Claude Code before you touch any code. Picking after migration is more expensive.

3. Run a one-day pilot of your top choice on a non-critical project.

4. Set a hard date for the cutover, ideally before the in-flight request phase-out ends.

5. Document the new commands and flag changes so your team isn't pasting old gemini snippets from Stack Overflow into the new tool.

Frequently asked questions

Did Google announce the Gemini CLI shutdown in advance?

Google gave roughly six weeks of notice via developer-channel posts before the June 18, 2026 cutoff. The shutdown wasn't a surprise to anyone watching the Google Cloud blog, but it caught a lot of individual developers who weren't paying close attention.

Is the free Gemini Code Assist tier coming back?

There's no indication Google plans to bring back a free individual tier. Antigravity CLI requires a paid Google account, and the enterprise tier is the only Gemini-branded CLI access still running.

Can I keep using the old Gemini CLI binary if I have it installed?

The binary still runs but it can't authenticate against any tier except enterprise. New tokens for AI Pro and Ultra accounts are rejected. The local install is effectively dead unless you're on enterprise.

How does Antigravity CLI pricing compare to Claude Code?

Antigravity CLI is bundled with Google AI Pro, Ultra, and Enterprise subscriptions. Claude Code uses Anthropic's API pricing or a Claude Max subscription. For an individual developer, Claude Max is generally competitive with AI Pro. For a team, the math depends on usage volume and whether you also need Workspace integration.

Will Antigravity CLI eventually be open-sourced?

Google has not committed to open-sourcing Antigravity CLI. The closed-source posture appears intentional and aligned with the Antigravity 2.0 desktop product strategy.

What happens to existing Gemini CLI extensions in VS Code?

The IDE extensions stopped serving requests on June 18, 2026 for AI Pro, Ultra, and free Code Assist tiers. The extension still installs but errors on every request. Google recommends switching to the Antigravity extension, which is a separate marketplace install.

Bottom line

The Gemini CLI shutdown on June 18, 2026 forces a decision: migrate to Antigravity CLI inside the Google ecosystem, switch to Claude Code for model independence, or stay on the enterprise tier if you're already paying for it. The Antigravity path is lower-friction but closed-source. The Claude Code path is more work upfront but reduces lock-in. Either way, plan the cutover deliberately rather than letting it happen to you.

*Want help picking between Antigravity CLI and Claude Code for your team? Book a call with us.*

Gemini CLI Is Dead: What to Use Instead and How the Antigravity Transition Works