Gemini CLI vs Claude Code (2026): What to Use Before June 18

Choose Claude Code for a new paid terminal-agent setup; keep Gemini CLI on your shortlist if you already have supported enterprise or API access. Google ended Gemini CLI access for individual Google accounts on June 18, 2026, so the old free-versus-paid comparison no longer describes the choice. Google's consumer terminal path is now Antigravity CLI. Google's transition notice explains who is affected.

The 30-second verdict

Pick Claude Code if you want a paid coding agent with a documented path to Anthropic's current models. Claude Opus 5.5 is the account default for current Pro, Max, Team, Enterprise and direct Anthropic API setups unless a saved choice or administrator overrides it. Claude Sonnet 5.5 is also available; provider-specific defaults can differ. See the Claude Code model configuration.

Pick the Gemini side if you want Google's models or already work within its infrastructure, but check your credentials first. Gemini CLI still serves supported enterprise and API users. For individual Google accounts, evaluate Antigravity CLI, the replacement Google directs those users to, instead of assuming an old Gemini CLI free-tier tutorial still works.

A terminal agent is an AI tool that works from your command line, reads project files, runs commands and edits code. Both Gemini CLI and Claude Code provide that workflow. The useful comparison is the model you can actually select, the account that pays for it, and the permissions you give it.

Gemini CLI vs Claude Code at a glance

Verified against Google and Anthropic's official pages on October 17, 2026. These are documented capabilities and access conditions, not results from a hands-on coding benchmark.

Since October 13, 2026, Gemini 4 Argon has been generally available through Google's announced products and paid API. Claude Opus 5.5 shipped on September 22, 2026. The distinction for this comparison: Claude Code documents Opus 5.5 support, while Google's Gemini CLI page explicitly says it is not optimized for Argon and directs Argon users to Antigravity.

The access change that decides it: Gemini CLI's individual-account retirement

Google announced the transition on May 19, 2026, then ended Gemini CLI requests for free individual accounts, Google AI Pro and Google AI Ultra on June 18, 2026. Those dates describe a completed change, not an upcoming migration deadline. Google's announcement separates those accounts from the enterprise and API paths.

Two carve-outs matter. Organizations using Gemini Code Assist Standard or Enterprise keep access. Google also explicitly preserves access through paid Gemini and Gemini Enterprise Agent Platform API keys. The repository still exists; losing individual-account access does not mean the CLI source or every authentication route disappeared.

Antigravity CLI is Google's replacement terminal experience for affected users. It supports background subagents and configuration for plugins, MCP, skills and hooks. That matters if you want to hand off a task while keeping your terminal usable. It does not make it the same program with a different name: review the Antigravity CLI documentation before moving an automated workflow.

Gemini CLI, and Antigravity CLI, its consumer successor

Gemini CLI remains an open-source terminal agent for querying and editing codebases, running commands, connecting external tools through Model Context Protocol (MCP), and scripting non-interactive work. Its repository documents installation with npm install -g @google/gemini-cli and its Apache 2.0 license. That is useful when you need an inspectable CLI integrated into an existing Google workflow.

Use /model to inspect the available models. Google's selection page lists Auto options for Gemini 3 and Gemini 2.5, plus manual selection; its changelog separately confirms Gemini 3.1 Pro Preview support. Those pages establish specific CLI support. Argon's general availability does not expand that list by implication.

A context window is the amount of material a model can consider in a request. A larger window can help with a repository-wide investigation, but it does not guarantee that the agent loaded every relevant file or understood the dependencies. Ask it to identify the affected files and tests before editing, whichever tool you choose.

The free-tier numbers need an access caveat. Google's Gemini CLI quota page still prints 1,000 model requests per user per day for individual Google login and 250 per day, Flash only, for an unpaid Gemini API key. The same page warns that unpaid-tier and Google One users were moved to Antigravity. Treat these as the figures the documentation states, not a promise that a new personal account can still use the old free service. Google explicitly confirms the paid API and enterprise paths in its transition announcement.

For supported organizational access, Google's current Cloud quotas specify 1,500 requests per user per day for Code Assist Standard and 2,000 for Enterprise. Agent mode and Gemini CLI share those allowances, and a single prompt can trigger multiple model requests. Requests are not completed coding tasks.

For the consumer replacement, keep the plan and its limits together:

Antigravity Individual: $0/month, with basic weekly rate limits. Antigravity plans.
Google AI Pro: paid subscription with higher Antigravity limits; check Google's current US price.
Google AI Ultra: paid subscription with higher Antigravity limits; check Google's current US starting price.

Claude Code: the paid production pick

Claude Code is my recommendation for a developer starting a paid terminal workflow because its current model support and account paths are explicit. It can edit files, run commands and work across a project; it also offers IDE, desktop and web surfaces. The product documentation describes those capabilities. This recommendation is about fit and documented support, not a claim that it wins every coding task.

Update the client before comparing models: Anthropic's model docs require Claude Code v2.1.280 or later for Opus 5.5 and v2.1.284 or later for Sonnet 5.5. Run claude update, then inspect /model. Check the resolved version if you connect through a third-party provider or an organization-managed account.

Claude Free does not include Claude Code. The individual paid options, at current US web prices, are:

Claude Pro: $20/month, or $200 billed annually; Anthropic displays the annual option as $17/month. Pricing.
Claude Max 5x: $100/month, with 5x Pro's per-session usage allowance. Max plan.
Claude Max 20x: $200/month, with 20x Pro's per-session usage allowance. Max plan.

These are usage allowances, not guaranteed coding hours. Anthropic applies a five-hour session window and weekly limits, with usage shared across Claude and Claude Code. Model choice, context length and task complexity affect consumption. Use Claude Code's /usage display to see the plan bars instead of budgeting around a fixed weekly-hour estimate.

What you buy is a connected workflow: the desktop app supports reviewing diffs and scheduling tasks, while MCP connects external tools and skills and hooks customize repeatable work. For a developer moving between terminal work and visual review, those are concrete reasons to consider Claude Code. The limit is equally concrete: a paid subscription can still run out of included usage.

The rest of the field, in one breath

If neither account model fits, widen the shortlist before subscribing. OpenCode is an open-source coding agent with configurable providers; its documentation is a starting point if provider choice is your main constraint. Choosing the client and choosing the model can be separate decisions.

For a wider shortlist, the AI coding assistants covers the field, and Codex vs Claude Code vs Cursor compares other coding workflows. Use those to identify alternatives, then compare them on your own task rather than inheriting a universal benchmark ranking.

Who should pick what

The choice is "best agent for my situation and budget." Start with account eligibility, then test the work you need it to finish.

The decision rule

Choose by supported access first, then by task results. Start with Claude Code if you want a paid Anthropic workflow. Keep an already-supported Gemini CLI setup if it handles your work and fits your infrastructure. For Google's consumer terminal path, evaluate Antigravity CLI and its actual account limits.

Next week, give your shortlisted tools the same bounded bug fix on separate branches: ask each to identify the cause, make the change and run the relevant tests. Compare correctness, how much steering you supplied and the usage consumed. That is the evidence that should move you to a higher plan or a different agent.

How to migrate off Gemini CLI after the account transition

If you used an affected individual Google account, follow Google's migration path. If you have supported enterprise or paid API access, confirm that first; the retirement alone does not require you to move.

1. 1

   Install Antigravity CLI

   Use Google's Antigravity CLI installation page. Keep your existing configuration available for the migration process.

2. 2

   Import and review your configuration

   Google's migration guide says the first launch of agy detects legacy configurations and offers an interactive import. It also documents agy plugin import gemini for converting extensions. Review skills paths and MCP configuration changes, then check your usual workflow before relying on it.

3. 3

   Confirm the model and allowance

   Check which models your account offers and read its usage display. A paid plan raises capacity; it does not make agent work unlimited. If you keep Gemini CLI, its documented /stats model command shows session usage and applicable limits.

4. 4

   Keep supported enterprise and API setups when they fit

   If your organization uses Code Assist Standard or Enterprise, or you authenticate with a paid API key, confirm the account path with your administrator before migrating. Compare the replacement on a real repository task, including tools and permissions, before changing a working setup.

FAQ

Is Claude Code better than Gemini CLI?

For a new paid personal setup, Claude Code is the recommendation here because its current Anthropic model support and subscription access are clear. An existing enterprise or API-backed Gemini CLI workflow can still be the better fit. This is not a measured claim that Claude wins every coding task.

Can Gemini CLI replace Claude Code?

It can cover terminal coding workflows if you have supported access and its available models meet your needs. Check the account route first. Individual Google accounts were moved to Antigravity CLI, and Google's Gemini CLI documentation directs Argon users to Antigravity.

Can I use Claude Code skills in Gemini CLI?

Standard skill instructions can be portable: both Claude Code and Gemini CLI implement the Agent Skills standard. Review Claude-specific frontmatter, tool names, scripts and paths before reuse. A shared skill format does not establish that every hook or integration transfers unchanged.

Did Gemini CLI fully stop working on June 18?

No. Google's notice ended individual free, AI Pro and AI Ultra account access on that date in 2026. Supported enterprise licenses and API authentication remain separate paths. The current repository and documentation still describe Gemini CLI for those users.

Want a practical setup for terminal coding agents, including model selection and usage checks? Grab the Claude Code and Codex setup checklist and I will send it over.