The honest Gemini CLI vs Claude Code answer changed in mid-2026. Google retired Gemini CLI for individual users on June 18, 2026 and replaced it with the closed-source Antigravity CLI. So for most teams the real choice is now Claude Code or Antigravity CLI, and the deciding factor is roadmap stability, not a benchmark.
We build and ship client work as an AI-first digital agency, so the terminal agent we standardize on is not a personal preference. It touches every repo we touch on behalf of an agency partner. When Google deprecated Gemini CLI mid-year, that decision stopped being about which tool feels nicer in a shell and became about which vendor we can safely build a delivery pipeline on. This guide walks through what actually happened, how the two tools compare on the work that matters, and what an agency should standardize on now.
What happened to Gemini CLI in 2026?
Gemini CLI is being retired for individual users. At Google I/O on May 19, 2026, Google announced it was consolidating its developer tooling under the Antigravity brand and deprecating the standalone Gemini CLI. On June 18, 2026, Gemini CLI stopped serving requests for Google AI Pro, Ultra, and free Gemini Code Assist for individuals. There was no grace period.
The replacement is Antigravity CLI, invoked with the agy command. It is a Go-based rewrite, closed-source, and it ships as part of the wider Antigravity 2.0 platform that Google released across five developer surfaces at once. Enterprise and Gemini Code Assist Standard license holders keep Gemini CLI access. Everyone on the free and individual tiers had to migrate.
This matters for one blunt reason. Any comparison that still treats Gemini CLI as a live daily-driver choice for an individual developer is describing a tool that no longer serves that user. The 100,000-plus GitHub stars and the open-source community that built Gemini CLI did not carry over to a closed-source successor, and that shift is the real story of 2026.
Is Antigravity CLI just a renamed Gemini CLI?
No. Antigravity CLI is a ground-up rewrite, not a rename. Gemini CLI was TypeScript-based and open source under Apache 2.0. Antigravity CLI is a closed-source Go binary with a new config layout and a different quota model. The migration command carries over Agent Skills, Hooks, and Subagents, but Google acknowledged there would not be full feature parity at launch.
Two changes are worth flagging for anyone evaluating it. First, data handling shifted: under prior Gemini paid terms, interaction data was not used for training, while Antigravity defaults to collecting that data unless you opt out. Second, the quota model traded daily limits for weekly ones, and Antigravity had already cut usage quotas four times between December 2025 and March 2026, which locked some paying users out for days. That track record is part of the stability picture below.
Gemini CLI vs Claude Code: the core differences that still matter
Claude Code and the Gemini terminal tools take opposite design positions. Claude Code is a closed-source agent locked to Anthropic models, built around autonomous multi-step coding, and it has the most mature skills, hooks, and subagents ecosystem of the terminal agents. The Gemini side (now Antigravity CLI) is built around multi-agent orchestration as the default and tight Google ecosystem integration. Neither is universally better. The right pick depends on whether your work looks more like deep single-threaded engineering or parallel, high-context exploration.
Here is how they compare on the factors that decide most evaluations.
| Factor | Claude Code | Gemini CLI (retired) / Antigravity CLI |
| Status | Active, stable roadmap | Gemini CLI retired June 18, 2026; Antigravity CLI is the successor |
| Source model | Closed source | Gemini CLI was open source; Antigravity CLI is closed source |
| Default model | Claude Sonnet 5 (as of July 2026) | Gemini 3.5 Flash (High) |
| Entry price | $20/month Pro, no free tier | Antigravity preview: free rate limits during preview |
| Context window | 1M tokens | 1M tokens |
| Core strength | Autonomous multi-step coding, code review | Multi-agent orchestration, large-context exploration |
| Extensibility | Skills (SKILL.md), hooks, subagents, MCP | Subagents, slash commands, plugins |
| Model choice | Anthropic models only | Gemini models only |
Which is better for autonomous, multi-step coding?
Claude Code is generally stronger for autonomous, multi-step coding. Its design goal is agentic reliability: it plans a multi-file change, edits several files, runs your tests, and corrects itself with fewer dead ends. Developers who run both describe Claude Code as the careful engineer reviewing the system, while the Gemini tools feel like a fast assistant answering quickly. For refactoring, debugging, and structured multi-file work, that reliability is the thing you are actually paying for.
The extensibility gap reinforces this. Claude Code uses SKILL.md skills, hooks, and subagents to encode how it should behave in a specific project. We lean on this heavily. A skill that carries a client’s coding standards means the agent produces work that fits their codebase without re-explaining the rules every session. As of July 2026, Claude Code runs Claude Sonnet 5 by default, which Anthropic positions as its most agentic Sonnet model, scoring 63.2% on SWE-bench Pro against Opus 4.8’s 69.2%, so you can drop to a cheaper model for routine work and switch up to Opus 4.8 for the hardest problems.
Which handles large codebases and cost better?
The Gemini side wins on raw context economics, with a real caveat. A context window near 1 million tokens lets it read a large slice of a codebase in one pass, which helps when you map an unfamiliar project, and Google Search grounding pulls current docs into an answer without extra setup. During its free run, Gemini CLI offered 1,000 requests per day at no cost, which was the most generous deal in the agent space and the single biggest reason to pick it.
That advantage is now complicated. The free individual tier ended with the June 18 deprecation. Antigravity CLI runs free during its preview period, but preview pricing is not a foundation you build client delivery on, and the four prior quota cuts show how fast those limits can move. Claude Code has no free tier and starts at $20/month, but its pricing and footing have stayed steady through the same period.
How does the Antigravity CLI switch change the decision?
The Antigravity switch turns a feature comparison into a trust decision. The “Gemini CLI” side of this matchup is now a closed-source tool that replaced an open-source one on 30 days’ notice, defaults to collecting your interaction data, and shipped without full feature parity. For a developer experimenting on personal projects, that is a manageable trade. For anyone building repeatable workflows, it is a real risk signal.
The migration also broke things quietly. Any CI/CD pipeline, shell script, or automation that called the gemini command stopped working on June 18 with no warning. Teams that had wired Gemini CLI into automated pipelines had to find and fix every call site before the deadline. That is the kind of disruption that turns a cheap tool into an expensive one once you count the engineering hours.
None of this means Antigravity CLI is a bad tool. Its multi-agent orchestration is genuinely ahead of the field for naturally parallel workloads, and the Browser Subagent that drives a real Chrome instance through your app is the most novel feature shipping in any coding tool right now. The point is narrower: the switch introduced instability and a closed-source, data-collecting default at exactly the moment you are deciding what to build on.
Which one should an agency actually standardize on?
For most agencies shipping client work, Claude Code is the safer standard in 2026. The reasoning is not about benchmarks. It is about what a standardization decision actually commits you to. When we pick a terminal agent, we are committing client repos, delivery timelines, and internal training to it. A tool that Google just deprecated for individual users, replaced with a preview-stage successor, and rebuilt as closed source is not a foundation we would ask an agency partner to depend on this year.
Claude Code earns the default slot on three practical grounds. Its roadmap has stayed stable while the Gemini side went through a disruptive rebrand. Its skills and subagents let us encode each client’s standards so output stays consistent across a team. And its pricing is predictable, which matters when you are forecasting delivery cost per project rather than per developer hobby session.
Here is the honest tradeoff, and it is a real one. Claude Code has no free tier, so light or exploratory use costs more than Gemini CLI’s old free run ever did, and if your work is naturally parallel across many small independent tasks, Antigravity’s multi-agent model is genuinely better suited to that shape than Claude Code’s single-agent design. An agency doing heavy large-context research across giant codebases, with the budget appetite for a preview-stage tool, has a legitimate reason to keep Antigravity in the mix. Standardizing on Claude Code is a bet on stability, not a claim that it wins every task.
When should you use each one?
Match the tool to the work, and factor in how much stability the work demands. The choice is rarely all-or-nothing, and plenty of developers run both.
- Pick Claude Code if you need reliable autonomous multi-step coding, code review, and customized workflows through skills, or if you are standardizing a team on one tool and value a steady roadmap. This is the stronger default for production and client delivery.
- Consider Antigravity CLI if your workload is naturally parallel across many independent tasks, you are deep in the Google ecosystem, or you want to test the multi-agent orchestration and Browser Subagent while the preview is free. Keep a fallback alive until it proves it covers your real pipeline.
- Use both if you want Claude Code for production-critical complex changes and the Gemini side for cheap large-context exploration, such as one-shot queries over a giant codebase. This split is common and works well, as long as nothing load-bearing depends on the preview tool.
The practical move for anyone tool-shopping fresh is to install the successor, port one real workflow, and keep your existing tool running until the new one survives your actual pipeline. New tools earn trust by handling real work, not a demo.
Ready to hand off the tooling decision?
If you would rather have the shipped result than manage which terminal agent your team standardizes on, that is what we do. Survyc is an AI-first digital agency that builds and delivers client work using tools like Claude Code as part of an agency’s embedded team. Tell us what you want built and we will handle the stack behind it. Reach out at info@survyc.com.
Frequently asked questions
Is Gemini CLI still available in 2026?
Not for individual users. Gemini CLI stopped serving requests for Google AI Pro, Ultra, and free Gemini Code Assist for individuals on June 18, 2026. Gemini Code Assist Standard and Enterprise license holders keep access. Everyone else was moved to Antigravity CLI, the closed-source Go-based successor invoked with the agy command.
Is Antigravity CLI the same as Gemini CLI?
No. Antigravity CLI is a ground-up rewrite, not a rename. Gemini CLI was open source and TypeScript-based; Antigravity CLI is closed source, built in Go, and part of the wider Antigravity 2.0 platform. Migration carries over skills, hooks, and subagents, but Google confirmed there was not full feature parity at launch, and the data-collection default changed.
Is Claude Code worth $20 a month versus a free tier?
For team and client work, usually yes. Claude Code starts at $20/month on the Pro plan (as of July 2026) with no free tier, while the Gemini side offered a free run that ended with the June deprecation. The value is roadmap stability, agentic reliability, and predictable cost, which matter more than a free tier when you are forecasting delivery cost per project.
Which is better for agencies shipping client work?
Claude Code is the safer standard for agencies in 2026. The deciding factor is stability, not a benchmark. A tool that was just deprecated for individuals and rebuilt as a closed-source preview is a risky foundation for client delivery, while Claude Code’s roadmap, skills-based consistency, and predictable pricing suit a team standardizing on one agent.
What is Antigravity CLI’s default model?
Antigravity CLI connects to Gemini 3.5 Flash (High) by default, announced at Google I/O 2026. Google positions it as running roughly four times faster than other frontier models in its tier while outperforming Gemini 3.1 Pro on coding and agentic benchmarks, though those are vendor figures. You can swap models with a flag. Claude Code runs Claude Sonnet 5 by default over the same period.
Did the June 18 deadline break automation?
Yes, for anyone who did not migrate. Any CI/CD pipeline, shell script, or automation calling the gemini command stopped working on June 18, 2026 with no grace period. Teams had to find and update every call site before the deadline. This silent-failure risk was the most important thing to handle during the transition, and it is a reminder to keep tooling dependencies documented.
