Codex in ChatGPT is an advanced AI-powered code assistant designed to streamline and automate software development tasks within the ChatGPT interface.
What is Codex?
AI‑powered software engineering agent: Codex acts like a virtual developer—able to read, write, test, debug, and propose pull requests within your codebase—all using natural language prompts godofprompt.ai+8help.openai.com+8theverge.com+8openai.com+1datacamp.com+1.
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codex‑1: A specialized version of OpenAI’s o3 model, fine-tuned via reinforcement learning for real-world programming workflows trickywebsolutions.com+8openai.com+8datacamp.com+8.Sandbox execution: Each task runs in an isolated cloud container preloaded with your repository, complete with real-time logs, test results, and secure isolation help.openai.com+3openai.com+3godofprompt.ai+3.
Parallel task handling: You can run multiple coding or QA tasks at once, all visible and monitorable through the Codex sidebar .
As a result, Codex helps developers offload routine or repetitive tasks—like bug fixes, unit test creation, code refactoring—while still keeping full review and approval control.
How to Enable Codex for Your Workspace
For Workspace Admins (Team, Pro, Enterprise, and now Plus)
Toggle Codex ON
Visit Workspace Settings → Codex toggle (labelled “Allow members to use Codex”) and switch it ON openai.com+3datacamp.com+3godofprompt.ai+3help.openai.com+1help.openai.com+1.
In Enterprise plans, this is under Manage Workspace → Settings help.openai.com+2help.openai.com+2reddit.com+2.
Wait ~10 minutes
After activation, the Codex UI (“Code” or “Ask” options) appears in ChatGPT’s left sidebar within ~10 minutes datacamp.com+5help.openai.com+5emelia.io+5.
Connect GitHub & Create Environment
Users click Codex → Get Started → Connect to GitHub, authorize repos, and choose which ones Codex can access gist.github.com+4help.openai.com+4datacamp.com+4godofprompt.ai+3datacamp.com+3help.openai.com+3.
Then create an environment by selecting the target repo/branch—Codex clones it and sets up a secure sandbox.
(Optional) Customize Environment
You can configure environment setup scripts or an
AGENTS.mdfile to guide Codex’s behavior gist.github.com+9openai.com+9datacamp.com+9.
For Plus, Team, Enterprise, and soon Edu users, this rollout supports upgrades from Pro onward help.openai.com+7help.openai.com+7openai.com+7.