Codex

What is Codex?

OpenAI's coding agent for local projects and cloud tasks.

What you can do

• Local coding workflows
• Editor and terminal access
• Cloud tasks

Good for

• Understanding and changing a project with repository context.
• Debugging a reproducible issue and checking the fix.
• Completing a bounded coding task locally or in a prepared cloud environment.

What to keep in mind

• Generated changes still need diff review and project verification.
• Local and cloud execution have different environments and access rules.
• Subscription and API-key authentication have distinct billing and feature conditions.

Getting started

1. Use the official quickstart to choose desktop, CLI, editor, or cloud access.
2. Open the intended project and state the behavior a successful change must produce.
3. Review the diff and verification output before adopting the result.