Gemini CLI: This Client Is No Longer Supported for Gemini Code Assist for Individuals
This message is not a login bug you can fix by reinstalling. Google deprecated consumer access to Gemini Code Assist: starting June 18, 2026, the Gemini Code Assist IDE extensions stopped serving requests for the Gemini Code Assist for individuals (free), Google AI Pro and Google AI Ultra tiers, and the same applies to Gemini CLI. The 'Login with Google' option no longer works for those accounts, which is why the browser shows 'Authentication successful' and the terminal then reports 'Failed to sign in. This client is no longer supported for Gemini Code Assist for individuals. To continue using Gemini, please migrate to the Antigravity suite of products.' Google's replacement for personal accounts is the Antigravity family, including Antigravity CLI, with its own pricing and quotas. Business users on Gemini Code Assist Standard or Enterprise are on a separate deprecation schedule, and developers can still call Gemini models through a paid API key. The fix is choosing the right replacement for how you work.
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Symptoms You Might See
Browser sign-in says 'Authentication successful' but Gemini CLI then fails
The error says 'This client is no longer supported for Gemini Code Assist for individuals'
It continues after reinstalling Gemini CLI or deleting ~/.gemini
The Gemini Code Assist extension in VS Code or JetBrains stops responding for a personal account
You have an active Google AI Pro or Ultra subscription and still cannot sign in
Common Causes
Consumer Gemini Code Assist was deprecated
Google's deprecation notice says that from June 18, 2026 the IDE extensions and Gemini CLI stopped serving requests for the individuals (free), Google AI Pro and Google AI Ultra tiers, and Login with Google no longer works for them.
A Google AI subscription does not change it
Paying for Google AI Pro or Ultra does not restore Gemini CLI or Code Assist access; those subscriptions now point coding use toward Antigravity.
Using an old sign-in path
Scripts, dotfiles and tutorials written before June 2026 still choose Login with Google, which now fails for personal accounts.
Step-by-Step Fixes
Move to Antigravity CLI
When to try: First, if you used Gemini CLI with a personal or Google AI account
Google's recommended path for personal accounts is the Antigravity family. Install Antigravity CLI from antigravity.google and follow Google's Gemini CLI migration guide at antigravity.google/docs/gcli-migration to carry over your settings and workflow. Check Antigravity's pricing page for quotas on your plan.
Use a Gemini API key instead of Login with Google
When to try: For automation and tools that only need model access
If you want to keep a script or tool that calls Gemini models, create an API key in Google AI Studio and authenticate with the key rather than Login with Google. API usage is billed separately under the Gemini API's own pricing and free tier rules.
Check whether you are on a business plan
When to try: If you use Gemini at work
If your company pays for Gemini Code Assist Standard or Enterprise, you are on a separate deprecation schedule. Sign in with your work account and ask your Google Cloud administrator about timelines.
Update scripts and editor settings
When to try: After you choose a replacement
Remove Gemini Code Assist extensions you can no longer use, and update dotfiles, CI jobs or tutorials that call gemini with Login with Google so they use Antigravity CLI or an API key instead.
Get help in the right place
When to try: If the replacement does not work
For problems with Antigravity CLI, Google directs users to the google-antigravity/antigravity-cli GitHub repository. Issues filed on the old Gemini CLI repository about this message will not restore access.
How to Prevent This
Follow Google's developer blog and deprecation pages for the tools you rely on
Prefer API keys for scripts so they do not depend on consumer sign-in
Keep a list of tools that use Google sign-in so migrations are quick
When to Contact Support
Contact Google only if you are on a Gemini Code Assist Standard or Enterprise subscription and are blocked before your organisation's published deprecation date, or if Antigravity CLI fails to sign in. Consumer Gemini CLI access will not be restored by support.
Frequently Asked Questions
Why does Gemini CLI say it is no longer supported?▼
Google deprecated Gemini Code Assist for consumer accounts. From June 18, 2026 the IDE extensions and Gemini CLI stopped serving the free individuals tier and the Google AI Pro and Ultra tiers, so Login with Google fails with this message.
I pay for Google AI Pro. Why can't I use Gemini CLI?▼
The deprecation covers Google AI Pro and Ultra as well as the free tier. Google points those subscribers to the Antigravity products instead.
What is Antigravity CLI?▼
It is Google's command-line coding agent in the Antigravity family, the replacement Google recommends for personal Gemini CLI users. Google publishes a migration guide from Gemini CLI.
Can I still use Gemini models from the command line?▼
Yes, through Antigravity CLI or by calling the Gemini API with an API key from Google AI Studio, which is billed separately.
Does this affect Gemini Code Assist Standard and Enterprise?▼
Those business subscriptions have a separate deprecation schedule published in Google Cloud's documentation.
Sources and verification
Product behavior and limits can change. These primary sources were used to verify this guide.
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