Gemini CLIvsCodex
Two coding agent tools, the same questions. Every answer comes from the official pages, with the date we checked. Nothing here is ranked.
last check 2026-10-11
Gemini CLI
by Google
Google's open-source terminal agent for Gemini; since June 18, 2026 it no longer serves free users or Google AI Pro and Ultra subscribers.
All Gemini CLI factsCodex
by OpenAI
OpenAI's coding agent for the terminal, IDE, desktop app and web, with cloud tasks; included in ChatGPT plans or usable with an API key.
All Codex factsWhere they differ
- Free planGemini CLI: Not supportedCodex: Supported
- AI modelsGemini CLI: gemini-3-pro-preview, gemini-3-flash-preview, gemini-2.5-pro, gemini-2.5-flashCodex: GPT-6.1 Sol, GPT-6 Sol, GPT-6 Luna
- Where it runsGemini CLI: TerminalCodex: Web, Terminal, IDE extension, Cloud, Desktop app
- Open sourceGemini CLI: SupportedCodex: Limited
- Included inGemini CLI: Included with Gemini Code Assist Standard and Enterprise licences; no longer with Google AI Pro or Ultra since June 18, 2026Codex: Included in ChatGPT Free, Go, Plus, Pro, Business, Edu and Enterprise
Confirmed for only one of the two so far: works in the cloud. The table below shows which.
Same answer for both: works on your computer, MCP, operating systems, pay per use with an API key.
Plans and prices
As listed on each official pricing page, in the currency we were shown. No conversion, no rounding.
Gemini CLI
- Gemini Code Assist Standard (monthly) Team$22.80 / month
- Gemini Code Assist Standard (annual) Team$19.00 / month, billed annually
- Gemini Code Assist Enterprise (monthly) Enterprise$54.00 / month
- Gemini Code Assist Enterprise (annual) Enterprise$45.00 / month, billed annually
Codex
- Free Free plan$0.00 / month
- Go Paid, individual$8.00 / month
- Plus Paid, individual$20.00 / month
- Pro ($100) Paid, individual$100.00 / month
- Pro ($200) Paid, individual$200.00 / month
- Pro ($500) Paid, individual$500.00 / month
- Business (annual) Team$20.00 / month, billed annually
- Business (monthly) Team$25.00 / month
- Enterprise & Edu EnterprisePrice not confirmed
Full comparison with sources
| Coding agent | ||
| What it is for | ||
| What it is for | Google's open-source terminal agent for Gemini; since June 18, 2026 it no longer serves free users or Google AI Pro and Ultra subscribers. | OpenAI's coding agent for the terminal, IDE, desktop app and web, with cloud tasks; included in ChatGPT plans or usable with an API key. |
| Good for | ||
| Editor's suggestion | No editor suggestion yet | No editor suggestion yet |
| Cost | ||
| Free planA free plan that is not time-limited. Trials are listed separately. |
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| Included inWhich subscriptions include it. |
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| Pay per use with an API keyCan be paid per token through the provider's API instead of a subscription. |
|
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| Plans and pricesOriginal currency and billing period. No conversion. |
|
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| AI models | ||
| AI modelsThe AI models the official pages name for this product. Line-ups change often, so check the date. |
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| Workflow | ||
| Where it runsIn a terminal, inside your editor, as its own editor app, on the web or in the cloud. |
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| Works on your computerEdits files and runs commands on your own machine, with permission settings. |
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| Works in the cloudWorks on a task in a cloud sandbox while you do something else. |
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| MCPSupports the Model Context Protocol, a standard way to connect tools and data sources. |
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| Requirements | ||
| Operating systemsmacOS, Windows or Linux, as officially supported. |
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| Open sourceThe tool's own code is published under an open-source licence. |
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| Sources and confidence | ||
| Confidence | Last checked 2026-10-11 Not yet confirmed: Works in the cloud | Last checked 2026-10-11 All compared fields have a confirmed value. |
What it is for
What it is for
Gemini CLI:
Google's open-source terminal agent for Gemini; since June 18, 2026 it no longer serves free users or Google AI Pro and Ultra subscribers.
Codex:
OpenAI's coding agent for the terminal, IDE, desktop app and web, with cloud tasks; included in ChatGPT plans or usable with an API key.
Editor's suggestion
Gemini CLI:
No editor suggestion yetCodex:
No editor suggestion yetCost
Free plan
A free plan that is not time-limited. Trials are listed separately.
Gemini CLI:
- Not supportedgeminicli.comchecked 2026-10-11
Codex:
- Supportedlearn.chatgpt.comchecked 2026-10-11
Free plan
Included in
Which subscriptions include it.
Gemini CLI:
- Included with Gemini Code Assist Standard and Enterprise licences; no longer with Google AI Pro or Ultra since June 18, 2026codeassist.googlechecked 2026-10-11
Codex:
- Included in ChatGPT Free, Go, Plus, Pro, Business, Edu and Enterpriselearn.chatgpt.comchecked 2026-10-11
Plans: Free, Go, Plus, Enterprise & Edu
Pay per use with an API key
Can be paid per token through the provider's API instead of a subscription.
Gemini CLI:
- Supportedgeminicli.comchecked 2026-10-11
Plan not specified
Codex:
- Supportedlearn.chatgpt.comchecked 2026-10-11
Plan not specified
Plans and prices
Gemini CLI:
- Gemini Code Assist Standard (monthly) (Team)$22.80 / month
- Gemini Code Assist Standard (annual) (Team)$19.00 / month, billed annually
- Gemini Code Assist Enterprise (monthly) (Enterprise)$54.00 / month
- Gemini Code Assist Enterprise (annual) (Enterprise)$45.00 / month, billed annually
- All plan details and sources
Codex:
- Free (Free plan)$0.00 / month
- Go (Paid, individual)$8.00 / month
- Plus (Paid, individual)$20.00 / month
- Pro ($100) (Paid, individual)$100.00 / month
- Pro ($200) (Paid, individual)$200.00 / month
- Pro ($500) (Paid, individual)$500.00 / month
- Business (annual) (Team)$20.00 / month, billed annually
- Business (monthly) (Team)$25.00 / month
- Enterprise & Edu (Enterprise)Price not confirmed
- All plan details and sources
AI models
AI models
The AI models the official pages name for this product. Line-ups change often, so check the date.
Gemini CLI:
- gemini-3-pro-preview, gemini-3-flash-preview, gemini-2.5-pro, gemini-2.5-flashgeminicli.comchecked 2026-10-11
Codex:
- GPT-6.1 Sol, GPT-6 Sol, GPT-6 Lunalearn.chatgpt.comchecked 2026-10-11
Workflow
Where it runs
In a terminal, inside your editor, as its own editor app, on the web or in the cloud.
Gemini CLI:
- Terminaldocs.cloud.google.comchecked 2026-10-11
Codex:
- Web, Terminal, IDE extensionlearn.chatgpt.comchecked 2026-10-11
Plus plan
- Cloud, Web, Desktop applearn.chatgpt.comchecked 2026-10-11
Works on your computer
Edits files and runs commands on your own machine, with permission settings.
Gemini CLI:
- Supportedcodeassist.googlechecked 2026-10-11
Plan not specified
Codex:
- Supportedlearn.chatgpt.comchecked 2026-10-11
Plan not specified
Works in the cloud
Works on a task in a cloud sandbox while you do something else.
Gemini CLI:
- Not yet confirmed
Codex:
- Supportedlearn.chatgpt.comchecked 2026-10-11
Plan not specified
MCP
Supports the Model Context Protocol, a standard way to connect tools and data sources.
Gemini CLI:
- Supportedgeminicli.comchecked 2026-10-11
Plan not specified
Codex:
- Supportedlearn.chatgpt.comchecked 2026-10-11
Plan not specified
Requirements
Operating systems
macOS, Windows or Linux, as officially supported.
Gemini CLI:
- macOS, Windows, Linuxgeminicli.comchecked 2026-10-11
Codex:
- macOS, Linux, Windowslearn.chatgpt.com +1checked 2026-10-11
Open source
The tool's own code is published under an open-source licence.
Gemini CLI:
- Supportedgithub.comchecked 2026-10-11
Plan not specified
Codex:
- Limitedgithub.comchecked 2026-10-11
Plan not specified
The CLI and SDK are open source; the docs list the IDE extension and Codex cloud as not open source.
Sources and confidence
Confidence
Gemini CLI:
Last checked 2026-10-11
Not yet confirmed: Works in the cloud
Codex:
Last checked 2026-10-11
All compared fields have a confirmed value.