Gemini CLI vs Claude Code
Gemini CLI is free and open source (Apache-2.0) and runs Gemini models only; you pay the model provider per token. Claude Code is a paid product at $20 to $200 a month. Running Gemini CLI for regular daily work costs roughly $70 a month in API fees on Gemini 4 Argon, or $14 on Gemini 3.5 Flash-Lite. With a Gemini API key, Google’s free tier covers Flash models such as Gemini 3.8 Flash at lower rate limits; free-tier prompts may be used to improve Google’s products.
GitHub data updated October 18, 2026; Claude Code prices verified October 18, 2026.
Side by side
| Gemini CLI | Claude Code | |
|---|---|---|
| Price | Free; you pay for model usage | $20 to $200 a month |
| Source code | Open source (Apache-2.0) | Proprietary (Anthropic) |
| Made by | Anthropic | |
| Runs in | Terminal | Terminal, IDE extensions, desktop and web |
| Models | Gemini models only, through a Google account or a Gemini API key | Anthropic’s Claude models only |
| Local models | No | Not officially supported |
| GitHub stars | 107,439 | — |
| Last commit | October 18, 2026 | — |
What is Gemini CLI?
Google’s open-source terminal agent for Gemini. Sign in with a Google account, or use a Gemini API key to pick the model and pay per token.
With a Gemini API key, Google’s free tier covers Flash models such as Gemini 3.8 Flash at lower rate limits; free-tier prompts may be used to improve Google’s products.
Gemini CLI on GitHub ↗107k stars
Gemini CLI on your own API key vs Claude Code plans
Estimated monthly API fees for Gemini CLI, by model and usage:
| Model on your API key | Light 300 steps/mo | Regular 1,500 steps/mo | Heavy 6,000 steps/mo |
|---|---|---|---|
| Gemini 4 Argon | $14 | $70 | $281 |
| Gemini 3.8 Flash | $5.58 | $28 | $112 |
| Gemini 3.5 Flash-Lite | $2.83 | $14 | $57 |
For comparison, Claude Code: Claude Pro $20/mo ($17/mo billed yearly); Claude Max 5x $100/mo; Claude Max 20x $200/mo.
Each agent step is assumed to send about 40,000 input tokens (70% read from the prompt cache) and return about 2,000 output tokens, as in our cost calculator’s coding-agent scenario. Light is about one short task a day, regular is several tasks every working day, heavy is agents running most of the day. Real usage varies with the size of your codebase and how each tool manages context, so treat these as orders of magnitude. A local model costs nothing per token but needs hardware that can run it.
Which should you pick?
- Choose Claude Code if you want a flat monthly price with usage included; it runs Anthropic’s Claude models only.
- Choose Gemini CLI if you want Gemini models with pay-as-you-go billing and an open-source client.
- Light or occasional use? Paying per token often costs less than any plan; check your numbers in the subscription vs API calculator.
Frequently asked questions
- Is Gemini CLI free?
- Yes, Gemini CLI is free and open source under Apache-2.0. The models it calls are not: you pay your provider per token. With a Gemini API key, Google’s free tier covers Flash models such as Gemini 3.8 Flash at lower rate limits; free-tier prompts may be used to improve Google’s products.
- Is Gemini CLI better than Claude Code?
- Neither wins outright. Claude Code gives you a flat monthly price ($20 to $200 a month) with usage included. Gemini CLI is better if you want Gemini models with pay-as-you-go billing and an open-source client.
- Can Gemini CLI use Claude models?
- No. Gemini CLI runs Gemini models only, through a Google account or a Gemini API key.
- How much does Gemini CLI cost per month?
- Gemini CLI itself costs nothing. API fees at about 1,500 agent steps a month come to roughly $70 on Gemini 4 Argon, $28 on Gemini 3.8 Flash and $14 on Gemini 3.5 Flash-Lite.
All open-source Claude Code alternatives · Also compared: OpenCode vs Claude Code, Aider vs Claude Code, Cline vs Claude Code.