Claude Code vs Gemini CLI: Which Terminal Coding Agent Should You Use?
Claude Code and Google's Gemini CLI are both AI coding agents that live in your terminal. How they compare on models, cost, free tiers, extensibility, safety controls and day-to-day workflow — and how to pick.
Claude Code (from Anthropic) and Gemini CLI (from Google) look almost identical at first glance: you open a terminal in your project, type what you want in plain English, and an AI agent reads your files, runs commands and edits code. Under the surface they differ in the models they run, how they're billed, and how much of the surrounding workflow they handle for you.
(New to the idea? Start with what is an AI coding agent? and what is Claude Code?.)
Both tools change quickly. Details below reflect each vendor's documentation in October 2026 — check the official pages before deciding on cost.
The quick answer
- Want the most capable agent for real, multi-step work on an existing codebase: Claude Code. It is the more mature agent — plan mode, hooks, subagents, skills, checkpoints and fine-grained permissions are all built in.
- Want to try a terminal agent at no cost, or you already live in Google Cloud: Gemini CLI. It is open source and has a generous free tier tied to a Google account.
Many developers install both. They don't conflict, and switching between them costs nothing but a different command.
What each one is
Claude Code is Anthropic's agentic coding tool. It runs in the terminal, in VS Code and JetBrains, in a desktop app and on the web. It uses Anthropic's Claude models — Opus, Sonnet and Haiku — and you pay through a Claude Pro or Max subscription or an Anthropic API key.
Gemini CLI is Google's open-source terminal agent (Apache 2.0 licence). It runs Google's Gemini models and authenticates with a personal Google account, a Gemini API key, or Vertex AI for businesses.
Side by side
| Claude Code | Gemini CLI | |
|---|---|---|
| Maker | Anthropic | |
| Models | Claude (Opus, Sonnet, Haiku) | Gemini |
| Source code | Closed source | Open source |
| Free option | No free tier for Claude Code | Free tier with a Google account |
| Paid options | Pro, Max, Team/Enterprise, or API key | Gemini API key or Vertex AI billing; Google AI plans |
| Project instructions file | CLAUDE.md |
GEMINI.md |
| MCP servers | Yes | Yes |
| Plan mode / read-only planning | Yes | Yes |
| Hooks, subagents, skills | Yes, mature | Extensions and newer equivalents |
| Where it runs | Terminal, IDE, desktop, web, phone | Terminal, IDE integrations |
Where they really differ
Model quality on agentic work
For a coding agent, the model matters more than the wrapper. Claude models have been the reference point for agentic coding for several generations: they're good at reading a large unfamiliar codebase, keeping a plan straight across many steps, and recovering when a test fails. Gemini models are strong too — especially with very large context windows — and the gap varies by task. The only benchmark that matters is your own repository: give both the same real task and compare the diffs.
Cost and limits
Gemini CLI's free tier is the headline: a personal Google account gets a daily allowance of requests at no cost. That makes it a sensible first agent for students and hobbyists.
Claude Code has no free tier. It's included with Claude Pro ($20/month) and Max, with usage limits that reset every five hours plus a weekly cap, or billed per token through an API key. See Claude Pro vs Max vs API key and Claude Code usage limits explained.
The workflow around the agent
This is where Claude Code is furthest ahead. It ships:
- Plan mode — read-only exploration before any edits.
- Permission modes and allow/deny rules for commands.
- Hooks — your scripts run before or after tool calls, so rules are enforced, not just requested.
- Subagents and skills for reusable, specialised work.
- Checkpoints and rewind to undo an agent's edits.
- Headless mode and GitHub Actions for automation.
Gemini CLI covers the basics — file edits, shell commands, MCP, a project context file, extensions — and is catching up, but the safety rails and automation hooks are less complete.
Open source
If being able to read, fork and audit the agent's code matters to you, Gemini CLI wins outright. Claude Code's client is not open source.
Moving between them
Your project instructions port easily: most of a CLAUDE.md works as a GEMINI.md, since both are just Markdown read at the start of a session. MCP servers work in both. The habits that make an agent effective — small tasks, clear acceptance criteria, reviewing diffs, committing often — are the same in either. See how to prompt AI coding tools.
How to choose
- Budget is zero: start with Gemini CLI's free tier.
- You already pay for Claude Pro or Max: Claude Code is included — use it.
- Serious work on a production codebase: Claude Code's guard rails (permissions, hooks, checkpoints) are worth paying for.
- Team on Google Cloud with Vertex AI: Gemini CLI fits the existing billing and identity.
- Not sure: give both the same real bug from your issue tracker and compare.
The summary
- Both are terminal coding agents that read files, run commands and edit code.
- Gemini CLI is open source with a free tier; Claude Code is paid but more mature.
- Claude Code has the stronger workflow: plan mode, hooks, subagents, skills, checkpoints, headless runs.
- Test both on your own code — that beats any comparison table.
EasySpawn runs Claude Code on a persistent server alongside your app and its database, so the agent works on the real running project from any device — bring your own Claude subscription or API key. See how it works or join the waitlist.
Related: Claude Code vs Cursor · Claude Code vs OpenAI Codex · Claude Code vs GitHub Copilot · Claude Code Tutorial for Beginners
Keep reading
Claude Code vs GitHub Copilot: What's the Difference?
GitHub Copilot started as autocomplete and grew into agents; Claude Code started as an agent. How they compare on workflow, models, GitHub integration and pricing — and why Copilot can even run Claude for you.
Claude Code vs Cursor: Which Should You Use in 2026?
Cursor is an AI code editor; Claude Code is an AI agent that runs in your terminal, IDE, desktop app or browser. How they differ in workflow, models, pricing and where they run — and why plenty of people use both.