Head to head · Editorial, not sponsored
Claude Code vs OpenAI Codex (2026): Which should you pick?
Short answer
Pick Claude Code if you want a terminal-native agent and already have a paid Claude plan.
Pick OpenAI Codex if you already use ChatGPT and want parallel cloud agents, with a free plan to start (lower limits).
Based only on the facts below: Pricing from claude.com, checked 2026-11-03. Pricing from learn.chatgpt.com, checked 2026-11-03. No scores and no hands-on testing (methodology).
Pricing at a glance
PaidClaude Code
Included with Claude Pro ($17/mo annual, $20 monthly), Max ($100/mo, 5x Pro usage) and Ultra ($200/mo, 10x Pro weekly usage, no 5-hour limit for verified accounts); API usage billed separately.
Official pricing page · checked 2026-11-03
Free tierOpenAI Codex
Free plan includes Codex with lower limits; Go $8/mo; Plus $20/mo; Pro $100, $200 or $500/mo; Business $20/user/mo (2+ users, annual; $25 monthly); Enterprise and Edu via sales. Codex shares one usage allowance with ChatGPT Work.
Official pricing page · checked 2026-11-03
Feature checklist
From each tool's pricing page and listed use cases. "Not listed" means it is not among the use cases we list for that tool, not that it cannot do it.
| Feature | Claude Code | OpenAI Codex |
|---|---|---|
| Pricing | ||
| Free tier or open-source option | Not listed | Yes |
| Open source | Not listed | Not listed |
| Free trial mentioned | Not listed | Not listed |
| Listed under | ||
| Coding | Yes | Yes |
| Agents | Yes | Yes |
| Testing | Not listed | Yes |
| Listed use cases | ||
| agentic coding in the terminal | Yes | Not listed |
| edit files and run commands | Yes | Not listed |
| understand a large codebase | Yes | Not listed |
| cloud coding agents | Not listed | Yes |
| automated PR review | Not listed | Yes |
| coding in terminal or IDE | Not listed | Yes |
Best for and skip if
Claude Code
Best for
- agentic coding in the terminal
- edit files and run commands
- understand a large codebase
Skip if this matters to you
- Usage limits depend on plan
- Terminal workflow has a learning curve for non-developers
From official docs and the pricing page, checked 2026-11-03.
OpenAI Codex
Best for
- cloud coding agents
- automated PR review
- coding in terminal or IDE
Skip if this matters to you
- Usage tied to ChatGPT plan limits, shared with ChatGPT Work
- Best experience requires ChatGPT account
From official docs and the pricing page, checked 2026-11-03.
Claude Code vs OpenAI Codex: FAQ
Should I use Claude Code or OpenAI Codex?
Pick Claude Code if you want a terminal-native agent and already have a paid Claude plan. Pick OpenAI Codex if you already use ChatGPT and want parallel cloud agents, with a free plan to start (lower limits). Based on the official pricing pages and docs listed on this page, checked 2026-11-03.
Is Claude Code free?
Not on a general free plan, per its pricing page. Included with Claude Pro ($17/mo annual, $20 monthly), Max ($100/mo, 5x Pro usage) and Ultra ($200/mo, 10x Pro weekly usage, no 5-hour limit for verified accounts); API usage billed separately. (official pricing page, checked 2026-11-03)
Is OpenAI Codex free?
Yes, it lists a free way to start. Free plan includes Codex with lower limits; Go $8/mo; Plus $20/mo; Pro $100, $200 or $500/mo; Business $20/user/mo (2+ users, annual; $25 monthly); Enterprise and Edu via sales. Codex shares one usage allowance with ChatGPT Work. (official pricing page, checked 2026-11-03)
How much do Claude Code and OpenAI Codex cost?
Claude Code: Included with Claude Pro ($17/mo annual, $20 monthly), Max ($100/mo, 5x Pro usage) and Ultra ($200/mo, 10x Pro weekly usage, no 5-hour limit for verified accounts); API usage billed separately. OpenAI Codex: Free plan includes Codex with lower limits; Go $8/mo; Plus $20/mo; Pro $100, $200 or $500/mo; Business $20/user/mo (2+ users, annual; $25 monthly); Enterprise and Edu via sales. Codex shares one usage allowance with ChatGPT Work. (official pricing pages, checked 2026-11-03).
What is the difference between Claude Code and OpenAI Codex?
Claude Code is listed for: agentic coding in the terminal; edit files and run commands; understand a large codebase. OpenAI Codex is listed for: cloud coding agents; automated PR review; coding in terminal or IDE.
Is Claude Code included with Claude Pro?
Yes. Claude Code is included in all paid Claude plans and shares the same usage limits as your chats. You can access it with Pro, Max, Ultra, Team or Enterprise, or with a Claude Console account billed at standard API pricing.
Source: Anthropic: Claude pricing and FAQ (checked 2026-10-29)
What are Claude Code's usage limits on Pro, Max and Ultra?
Pro and Max have a five-hour session limit and a weekly limit; Ultra has a weekly limit and no five-hour limit for verified accounts. Limits are shared across Claude and Claude Code. Max gives 5x Pro usage and Ultra 10x Pro weekly usage. When you hit a limit you can wait for the reset, turn on usage credits, upgrade, or switch to a Console account with API credits. If an ANTHROPIC_API_KEY environment variable is set, Claude Code uses that key and bills API usage instead of your plan.
Source: Claude help center: Use Claude Code with your Pro, Max, or Ultra plan; Anthropic: Claude pricing and FAQ (checked 2026-10-29)
Is Codex included with ChatGPT Plus?
Yes. Codex is included in ChatGPT Free, Go, Plus, Pro, Business, Edu and Enterprise, and it shares usage with ChatGPT Work. Plus usage is measured per five-hour period and weekly limits may also apply; Pro plans currently have no five-hour limit. Plus and Pro users who reach their limit can buy more credits, and anyone can run extra local chats with an API key at API rates.
Source: OpenAI docs: ChatGPT Work and Codex pricing (checked 2026-10-29)
Did you test Claude Code and OpenAI Codex?
No. Verdicts are based on each vendor's public docs and pricing pages, not hands-on testing, unless a page says otherwise.