It depends on the work. Choose Claude Code if you merge files of the same format by hand every month. Choose Codex if you already pay for a ChatGPT plan.
AI Basics · Tool Comparison
Claude Code vs Codex Compared
Both are coding agents that edit files and run commands when you tell them what to do. They differ in the plan you need and how you install them.
Free plans, Korean support, pricing, and security in one tableChecked 26 Sep 2026
VERDICT
How to choose
The “best for” notes from each tool’s page, side by side.
Claude Code: Best for- People who merge same-format files by hand every month
- Professionals who spend a lot of time organizing folders and bulk-editing documents
- People who want finished work from AI, not just answers
Better with another toolIf you only want to use free AI
Learn more about Claude Code →Codex: Best for- You already pay for a ChatGPT plan
- Team members who want to make simple screen edits or automate repetitive tasks themselves
- Managers who need to understand what inherited code does
Better with another toolOrganizations that don’t use ChatGPT
Learn more about Codex →COMPARE
Compared in one table
Pricing and terms were checked directly on each tool’s official pages. Check the official page again before you pay.
| Feature | Claude Code | Codex |
|---|---|---|
| Verdict | Coding AI that works in the terminal | Coding AI included with ChatGPT plans |
| Developer | Anthropic | OpenAI |
| Free | Paid The official documentation states that the free claude.ai plan does not include Claude Code. You need a Pro or higher plan, or a Console (API) account. | Free option available The official pricing page lists the Free ($0) plan as for 'exploring Codex with quick coding tasks.' For serious use, you need Go or higher. |
| Korean | Excellent You can give instructions and get explanations in Korean. Some on-screen menus are in English, but conversing in Korean works fine. | Fair You can give instructions in Korean and get explanations in Korean. However, the official docs and screen text are mostly in English, so it may feel unfamiliar at first. |
| Level | Intermediate | Advanced |
| Individual plans (start here) | Pro $22/month | Plus $20/month |
| Company pricing | Team · Standard seat $27.50 per user/month | Business $20/month per user |
| Training on your input | Anthropic states that it does not use consumer conversations for model training by default. This can vary by plan and settings, so check the current terms before adopting it company-wide. | The official pricing page confirms that admin controls, SAML SSO, and MFA are available on Business and above. Whether your input is used for training depends on your plan and settings, so check the original terms. |
| What it does well |
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| Weaknesses | Not included in the free plan. Per the official docs, you need a Pro, Max, Team, Enterprise, or Console (API) account to unlock it. It also edits real files on your computer, so it is safer to keep a copy of any important folder before you start. | Both the official docs and the pricing pages are written around development work. Limits are phrased like 'a number of local messages per 5 hours,' which is hard to gauge for non-developer roles. It is also tied to ChatGPT plans, so an organization that doesn’t use ChatGPT would find it hard to adopt this tool on its own. |
SCORE
Nanum ratings compared
Subjective ratings out of 5 from John Kim, CEO, based on his use of both tools in training and real work. The two tools are scored side by side on the same criteria.
Getting the job done
Claude Code
Codex
Easy to get started
Claude Code
Codex
Affordability
Claude Code
Codex
Video generation
Claude Code
Codex
Coding ability
Claude Code
Codex
DETAIL
Tool reviews
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Related pages
This comparison is not the result of running the same prompt through several tools. It brings together what we verified for each tool (official pricing pages, terms of service, and Nanum’s own ratings) in one place.
FAQ
- Claude Code: The official documentation states that the free claude.ai plan does not include Claude Code. You need a Pro or higher plan, or a Console (API) account.
- Codex: The official pricing page lists the Free ($0) plan as for 'exploring Codex with quick coding tasks.' For serious use, you need Go or higher.
- Claude Code (excellent Korean): You can give instructions and get explanations in Korean. Some on-screen menus are in English, but conversing in Korean works fine.
- Codex (fair Korean): You can give instructions in Korean and receive explanations in Korean. However, the official documentation and interface are mostly in English, so it may feel unfamiliar at first.
- Claude Code: Anthropic states that it does not use consumer conversations for model training by default. This can vary by plan and settings, so check the current terms before rolling it out company-wide.
- Codex: The official pricing page confirms that admin controls, SAML SSO, and MFA are available on Business and above. Whether your input is used for training depends on your plan and settings, so check the original terms.
Last updated 22 Sep 2026 · Free-plan availability, pricing, and terms are the values confirmed on each tool’s official page. Ratings are based on John Kim, CEO of Nanum Consulting, using these tools firsthand in training sessions and real work.
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