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Codex vs Claude Code: Which AI Coding Agent to Pick?
Short answer: Pick Claude Code if you want agentic coding directly from terminal or IDE; pick OpenAI Codex if you want multi-agent coding workflows. Claude Code starts at $100/month; OpenAI Codex has a free plan, paid from $20/month.
Claude CodeAnthropic's agentic coding tool for the terminal and IDE
OpenAI CodexOpenAI's coding agent for the terminal, IDE and cloudWhich to pick
Pick Claude Code if you want…
- Agentic coding directly from terminal or IDE
- Anthropic terminal coding agent
- Integrations with VS Code, JetBrains or Slack (on Claude Code's list, not OpenAI Codex's)
Pick OpenAI Codex if you want…
- Multi-agent coding workflows
- A free plan to start with
- Integrations with ChatGPT account or Plugins (on OpenAI Codex's list, not Claude Code's)
Written by the DevHunt team · updated Nov 7, 2026
The short answer
OpenAI Codex and Claude Code are the two big terminal-first coding agents: both read your repo, edit files, run commands and open pull requests, both run in a terminal, an IDE, a desktop app and the cloud, and both come bundled with a $20 chat subscription. Pick Codex if you already pay for ChatGPT, want an open-source CLI, or want to start for free. Pick Claude Code if you want the most configurable agent (skills, hooks, subagents, scheduled cloud tasks) and are happy to stay on Claude models. Everything below is as of November 2026.
Codex vs Claude Code at a glance
| OpenAI Codex | Claude Code | |
|---|---|---|
| Made by | OpenAI | Anthropic |
| Where it runs | CLI, IDE extension, desktop app, web (Codex Cloud), ChatGPT mobile, GitHub code review, Slack | CLI, VS Code and Cursor extension, JetBrains plugin, desktop app, web (claude.ai/code), mobile, Slack, GitHub Actions |
| Cheapest way in | Free and Go ($8/mo): quick tasks in the desktop app | Pro: $20/mo ($17/mo billed yearly) |
| Full agent from | ChatGPT Plus, $20/mo (CLI, IDE, web, code review) | Claude Pro, $20/mo |
| Heavier plans | Pro at $100, $200 or $500/mo (no five-hour limit for now) | Max at $100/mo (5x Pro usage) |
| Teams | Business $20/user/mo yearly ($25 monthly) | Team $20/seat yearly ($25 monthly); premium seats $100 yearly ($125 monthly) |
| Models | OpenAI models (GPT-6.1 Sol, GPT-6 Luna and others by plan), or any model your API key can use | Claude models only (Opus, Sonnet, Haiku; Fable on Max or via credits) |
| Pay per token instead | Yes, OpenAI API key (no cloud features) | Yes, Anthropic Console key, Amazon Bedrock, Google Cloud's Agent Platform (Vertex AI) or Microsoft Foundry |
| Open source | CLI is Apache-2.0 | No |
| Project instructions | AGENTS.md | CLAUDE.md (can read AGENTS.md) |
| Limits | Five-hour windows plus weekly limits | Five-hour windows plus weekly limits, shared with Claude chat |
Sources: Codex pricing, Claude pricing, Claude Code docs, Codex on GitHub.
The differences that matter
Price of entry. Codex is the only one of the two you can try without paying: ChatGPT Free and Go include it for small tasks in the desktop app. The real comparison is still $20 against $20, because the Codex CLI and IDE extension start at Plus. At the top end, ChatGPT Pro comes in three sizes ($100, $200, $500), while Claude has one Max plan at $100 listed on its pricing page.
Models. Claude Code only runs Claude models. On a subscription you get Opus, Sonnet and Haiku, and Claude's largest model, Fable, is included on Max up to half your weekly limit (on Pro it costs extra usage credits). Codex on a ChatGPT plan runs OpenAI's models; with an API key it runs whatever your key can access. If you want to switch model vendors per task, neither is the tool; look at Cursor or GitHub Copilot.
How limits feel. Both reset every five hours and also cap the week. OpenAI publishes ranges per model: on Plus, roughly 15 to 160 local messages per five hours with GPT-6.1 Sol, and 350 to 3,000 with the small GPT-6 Luna, with cloud tasks using more. Anthropic gives multiples instead (Max is 5x Pro) and Claude Code shares one pool with your Claude chats, so a long research session in the chat app eats into your coding time.
Open source and self-control. The Codex CLI is Apache-2.0: you can read how it sandboxes commands, patch it, or run it in CI with your own key. Claude Code is closed, but it is the more scriptable product out of the box: claude -p in pipes and CI, hooks that run your formatter after every edit, skills your team shares as slash commands, subagents for parallel work, and cloud scheduled tasks that keep running when your laptop is off.
Cloud work. Both let you start a task in the browser or on your phone and come back to a branch. Codex Cloud runs tasks in OpenAI's sandboxes and does automatic GitHub code review on Plus and up. Claude Code on the web does the same in Anthropic's cloud, and you can pull a cloud session into your terminal with claude --teleport.
A concrete example
Say you ask both to "add rate limiting to the public API and write tests". Codex in the CLI asks for approval based on its sandbox mode, makes the change, runs the tests and shows a diff; you can also hand the same prompt to Codex Cloud from ChatGPT and get a pull request. Claude Code plans first if you ask it to, edits across files, runs the tests, and with a hook configured it formats and lints every file it touched before it reports back. The output quality depends far more on the model and your instructions file than on the harness, so give each one the same AGENTS.md and judge on your own code.
Which to pick
- You already pay for ChatGPT Plus: start with Codex. It costs you nothing extra.
- You want to try an agent for free: Codex on ChatGPT Free or Go, for small tasks.
- You want to customize the agent heavily (hooks, shared skills, scheduled jobs, the Agent SDK): Claude Code.
- You need an open-source harness you can audit or fork: the Codex CLI.
- You run long, heavy sessions every day: compare ChatGPT Pro ($100 to $500) with Claude Max ($100) on your own usage dashboard after a week.
- Your company buys AI through AWS, Google Cloud or Azure: Claude Code runs through Amazon Bedrock, Google Cloud's Agent Platform or Microsoft Foundry; Codex needs an OpenAI plan or API key.
For the wider field, see the AI coding agents comparison, per-token prices in AI model pricing, and Codex vs Cursor.
Side by side
- What it is
- Claude Code:Claude Code is an agentic coding assistant that understands your codebase, edits files, runs commands, and helps ship features.
- OpenAI Codex:OpenAI Codex is an AI coding agent that assists across terminal, IDE, and cloud for planning, building, refactoring, reviewing, and releasing code.
- Best for
- Claude Code:Agentic coding directly from terminal or IDE
- OpenAI Codex:Multi-agent coding workflows
- Who it’s for
- Claude Code:Developers who want AI-assisted bug fixes, refactors, and feature implementation.
- OpenAI Codex:Developers and engineering teams needing AI-assisted coding and code review.
- Pricing
- Claude Code:Paid
- OpenAI Codex:Freemium
- Starting price
- Claude Code:$100/month (Max 5x)
- OpenAI Codex:$20/month (Plus)
- Plans
- Claude Code:Pro $17 per month with annual discount · Max 5x $100 per month · Max 20x $200 per month
- OpenAI Codex:Plus $20 per month · Pro $100 per month · Business $20 per user / month
- Works with
- Claude Code:VS Code, JetBrains, Slack, GitHub, GitLab, CLI tools, Claude desktop app
- OpenAI Codex:ChatGPT account, Plugins
Claude Code features
- Codebase understanding. Analyzes project structure and dependencies to provide high-level overviews and context.
- File editing & PR creation. Writes code, runs tests, and opens pull requests in GitHub or GitLab.
- Multi-hour refactors. Handles long-running migrations and refactors across many files.
- IDE integrations. Native extensions for VS Code and JetBrains IDEs.
- Terminal & Slack access. Works from your shell or Slack without leaving your workflow.
- Projects grouping. Groups related coding sessions for parallel agent supervision.
- Self-hosted beta. Runs Claude Code sessions on private infrastructure.
- Artifacts preview. Generates live, shareable artifacts of in-progress work.
OpenAI Codex features
- Parallel agent execution. Runs multiple coding agents simultaneously, using tools to verify work until requirements are met.
- Reusable cloud environments. Keeps tasks running in the cloud with per-repo environments that persist across devices.
- Automated PR reviews. Scans pull requests, surfaces findings, and answers questions to accelerate code review.
- Plugin ecosystem. Connects to external tools and adds specialized capabilities via plugins.
- Cross-platform access. Available in ChatGPT, IDE extensions, CLI, and web, all linked to a single account.
- Secure shared workspaces. Business plan offers admin controls and shared repositories for team collaboration.
Claude Code vs OpenAI Codex FAQ
Is Codex better than Claude Code?+
Neither wins everywhere. Codex is cheaper to start (it is in ChatGPT Free and Go for quick tasks, and the full CLI and IDE come with Plus at $20 a month) and its CLI is open source. Claude Code has the deeper customization story (CLAUDE.md, skills, hooks, subagents, scheduled tasks) and runs only on Claude models. Try both on a real task from your repo; most people can tell within a day which one fits how they work.
Is Claude Code free?+
No. As of November 2026 Claude Code is not in the Free Claude plan. It starts with Pro at $20 a month ($17 a month billed yearly), or you can pay per token with an Anthropic Console API key.
Is Codex free?+
Partly. ChatGPT Free and Go ($8 a month) include Codex for quick coding tasks in the desktop app. The CLI, IDE extension, web tasks and GitHub code review start with ChatGPT Plus at $20 a month. With an OpenAI API key you can run the CLI and IDE extension and pay per token, but without cloud features.
Is the Codex CLI open source? Is Claude Code?+
The Codex CLI is open source under Apache-2.0 at github.com/openai/codex. Claude Code is proprietary; Anthropic publishes docs, plugins and an issue tracker, but not the agent under an open-source license.
Can I use Codex and Claude Code in the same repo?+
Yes. Codex reads AGENTS.md, and Claude Code can read an existing AGENTS.md in place of a CLAUDE.md, so one instructions file can serve both. Many developers keep both installed and pick per task.
Which has higher usage limits, Codex or Claude Code?+
Both use rolling five-hour windows plus weekly caps on the $20 plans. OpenAI publishes an estimate per model (for example 15 to 160 local messages per five hours with GPT-6.1 Sol on Plus) and Pro currently has no five-hour limit. Anthropic describes Max at $100 a month as five times Pro usage. Exact numbers depend on task size, so check each usage dashboard after a week of real work.
What is the difference between Claude Code and OpenAI Codex?+
Claude Code focuses on terminal and IDE agents similar to Codex but is from Anthropic.
Should I use Claude Code or OpenAI Codex?+
Pick Claude Code if you want agentic coding directly from terminal or IDE, anthropic terminal coding agent or integrations with VS Code, JetBrains or Slack (on Claude Code's list, not OpenAI Codex's). Pick OpenAI Codex if you want multi-agent coding workflows, a free plan to start with or integrations with ChatGPT account or Plugins (on OpenAI Codex's list, not Claude Code's).
Is Claude Code or OpenAI Codex free?+
Claude Code is paid, from $100/month (Max 5x). OpenAI Codex has a free plan; paid plans start at $20/month (Plus).
Which is cheaper, Claude Code or OpenAI Codex?+
OpenAI Codex is cheaper to start with: OpenAI Codex's Plus plan ($20/month) against Claude Code's Max 5x plan ($100/month).
Do Claude Code and OpenAI Codex integrate with the same tools?+
Their integration lists don't overlap: Claude Code lists VS Code, JetBrains, Slack, GitHub and 3 more; OpenAI Codex lists ChatGPT account and Plugins.
On DevHunt
Based on each tool's website and DevHunt data. Details may change; check the official sites.