Codex
Cloud-based software engineering agent that answers codebase questions, executes code, and drafts pull requests.
At a Glance
Pricing
Freemium
Engagement
Available On
About Codex
Codex is a cloud-based software engineering agent from OpenAI that can work on many tasks in parallel. Powered by codex-1, a version of OpenAI o3 optimized for software engineering, Codex can perform tasks such as writing features, answering questions about your codebase, fixing bugs, and proposing pull requests for review. Each task runs in its own cloud sandbox environment, preloaded with your repository. Codex operates entirely within a secure, isolated container in the cloud with disabled internet access during task execution, limiting interaction solely to the code explicitly provided via GitHub repositories. The agent provides verifiable evidence of its actions through citations of terminal logs and test outputs, allowing you to trace each step taken during task completion. Users can review results, request further revisions, open GitHub pull requests, or directly integrate changes into their local environment. Codex can be guided by AGENTS.md files placed within repositories for project-specific instructions and best practices.
Demo Video
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Pricing
ChatGPT Plus
ChatGPT Plus plan with Access to Codex research preview and Limited access to Codex agent.
- Access to Codex research preview
- Limited access to Codex agent
- Included with ChatGPT Plus subscription
ChatGPT Pro
Professional plan with Access to Codex research preview and Extended access to Codex agent for power users.
- Access to Codex research preview
- Extended access to Codex agent
- Unlimited access to GPT-5
- Included with ChatGPT Pro subscription
ChatGPT Team
Designed for teams with Access to Codex agent for teams and Secure workspace integration and collaboration features.
- Access to Codex agent for teams
- Secure workspace integration
- Per user pricing (billed annually)
- Includes access to Codex and ChatGPT agent
ChatGPT Enterprise
Enterprise-grade solution with Enterprise-grade access to Codex and Advanced security and controls and dedicated support.
- Enterprise-grade access to Codex
- Advanced security and controls
- Custom pricing and terms
- Contact sales for pricing
Capabilities
Key Features
- Cloud-based software engineering agent
- Answers codebase questions
- Executes code in isolated sandbox
- Drafts pull requests
- Multiple parallel task execution
- GitHub repository integration
- AGENTS.md configuration support
- Real-time progress monitoring
- Verifiable action citations
- Terminal logs and test outputs
- Secure isolated container execution
- Task completion in 1-30 minutes
- Code writing and feature development
- Bug fixing and code analysis
- Command execution capabilities
- Test harness integration
- Linter and type checker support