OpenAI Codex Agent - AI Tool
OpenAI Codex Agent - The ChatGPT Engineer
About OpenAI Codex Agent
OpenAI's autonomous software engineering agent. Lives inside ChatGPT Pro, capable of planning, executing, and debugging end-to-end coding tasks in a secure cloud sandbox.
Key Capabilities
Autonomous 'o3' reasoning model
End-to-end task execution (up to 30 mins)
Secure cloud sandbox environment
Direct GitHub integration (PRs & Cloning)
Cross-file context awareness
No local setup required
Standout Features
Reasoning Engine
Powered by 'codex-1' (o3), optimized for deep software engineering tasks.
Cloud Sandbox
Executes code in a secure, isolated environment without touching your local machine.
Autonomous PRs
Can clone your repo, fix bugs, run tests, and open a Pull Request automatically.
Perfect for
OpenAI Codex Review: The Agent vs. The CLI (2026 Guide)
OpenAI has re-launched Codex in two flavors: a cloud agent (available on Plus for $20/mo) and a free CLI. We tested both to see which one actually replaces your junior dev.
Read ArticleCompare OpenAI Codex Agent
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