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.
- Free plan
- Verified free plan
- Paid from
- Go $8.00 / month
- Known for
- Codex Cloud, Codex code review, Codex Security
- Facts last checked
- 2026-10-11
What makes Codex different
OpenAI's coding agent for terminal, IDE, cloud and GitHub, in ChatGPT plans.
01
Codex Cloud
Runs coding tasks in cloud environments with your repos, so work continues while your computer sleeps.
Use it for: Handing off a bug fix and reviewing the pull request later.
How to start
- Open ChatGPT on the web or in the desktop app and sign in
- Choose Work in > Cloud and open Select environment
- Select Create environment, choose your GitHub repositories, select Get started, then Publish
- Select Start a new task and describe the task
On Plus, Pro, Business, Enterprise, Edulearn.chatgpt.comchecked 2026-10-1102
Codex code review
Codex reviews GitHub pull requests and posts a code review focused on serious issues.
Use it for: A second review pass on every pull request.
How to start
- Connect your GitHub repository to Codex
- Go to Codex settings, choose the repository and turn on Automatic review under Review code
- Or mention @codex review in a pull request comment
On Plus, Pro, Business, Enterprise, Edulearn.chatgpt.comchecked 2026-10-1103
Codex Security
Security agent that finds, confirms and helps fix vulnerabilities; runs as plugin, CLI or cloud scanner.
Use it for: Scanning a repository for vulnerabilities before a release.
How to start
- In the ChatGPT desktop app, open the ChatGPT dropdown and select Codex
- Install and enable the Codex Security plugin to open Security in the sidebar
- Use Scans to start a scan and Findings to review the issues
On Enterprise, Edulearn.chatgpt.comchecked 2026-10-1104
Codex CLI
Open-source agent in your terminal that reads, edits and runs code in your local repository.
Use it for: Refactoring local code, or running Codex in CI with codex exec.
How to start
- Install: curl -fsSL https://chatgpt.com/codex/install.sh | sh (npm and Homebrew also work)
- Open a project directory and run codex
- Choose Sign in with ChatGPT, then describe your first task
On Plus, Pro, Business, Enterprise, Edu, API keygithub.comchecked 2026-10-11
Comes with the same subscription
Cost
- Free planA free plan that is not time-limited. Trials are listed separately.
- Supportedlearn.chatgpt.comchecked 2026-10-11
Free plan
- Included inWhich subscriptions include it.
- 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 keyCan be paid per token through the provider's API instead of a subscription.
- Supportedlearn.chatgpt.comchecked 2026-10-11
Plan not specified
Plans
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 annuallyPer user.
Minimum seats: not confirmed, so no total price is calculated.
Business (monthly)
Team
- $25.00 / monthPer user.
Minimum seats: not confirmed, so no total price is calculated.
Enterprise & Edu
Enterprise
Amount not confirmed. See official pricing
All features7 questions, each with its source and the date we checked it
AI models
- AI modelsThe AI models the official pages name for this product. Line-ups change often, so check the date.
- GPT-6.1 Sol, GPT-6 Sol, GPT-6 Lunalearn.chatgpt.comchecked 2026-10-11
Workflow
- Where it runsIn a terminal, inside your editor, as its own editor app, on the web or in the cloud.
- Web, Terminal, IDE extensionlearn.chatgpt.comchecked 2026-10-11
Plus plan
- Cloud, Web, Desktop applearn.chatgpt.comchecked 2026-10-11
- Works on your computerEdits files and runs commands on your own machine, with permission settings.
- Supportedlearn.chatgpt.comchecked 2026-10-11
Plan not specified
- Works in the cloudWorks on a task in a cloud sandbox while you do something else.
- Supportedlearn.chatgpt.comchecked 2026-10-11
Plan not specified
- MCPSupports the Model Context Protocol, a standard way to connect tools and data sources.
- Supportedlearn.chatgpt.comchecked 2026-10-11
Plan not specified
Requirements
- Operating systemsmacOS, Windows or Linux, as officially supported.
- macOS, Linux, Windowslearn.chatgpt.com +1checked 2026-10-11
- Open sourceThe tool's own code is published under an open-source licence.
- 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.