What changes with Codex Cloud?

Developers can prepare a project environment, with repositories, tools and dependencies, and reuse it for separate tasks. Each task runs on a dedicated virtual machine and continues even if the computer is off; it can be resumed from desktop, web or phone.

How is an environment set up?

Codex analyzes the GitHub repository, detects dependencies and drafts the install script. Changes to the environment are made in conversation with Codex.

Who can use Codex cloud environments?

ChatGPT Plus and Pro subscribers, with reduced resources (half the processors and memory compared with higher tiers), and Business, Enterprise, Edu and Healthcare workspaces with full access.

What are the current limits?

For now GitLab and self-hosted GitHub Enterprise are not supported, and browser-based coding and computer use are not available inside cloud environments.

What is Codex Security Cloud?

It is a security tool launched at DevDay that scans GitHub repositories on demand or on a schedule and prepares fixes, even while the user is offline.

OpenAI Codex Cloud: Reusable Environments, Plans and Limits

At DevDay on September 29, 2026, OpenAI announced reusable cloud environments for Codex: what used to be isolated sandboxes become persistent workspaces, configured once and reusable for every new task. The practical novelty is that the work keeps going even when the laptop is closed.

How they work

A developer prepares an environment from a GitHub project, with its repository, tools and dependencies, and publishes it. Codex analyzes the repository, detects dependencies and drafts the install script; any changes are made in conversation with Codex itself.

From then on each task:

runs on a dedicated virtual machine
keeps working while the computer sleeps, for example investigating results, removing duplicates and preparing fixes
can be resumed from desktop, web or phone, because changes not yet sent to the repository stay with the task

For credentials, the environment supports variables and network secrets: a proxy inserts the real value only when traffic heads to a domain on the allow list.

The other DevDay news for Codex

A revamped CLI, with voice commands to start and direct tasks
A new code review experience in the ChatGPT desktop app, to read summaries and explore changes on GitHub and GitLab
Codex Security Cloud, which scans GitHub repositories on demand or on a schedule and prepares fixes even while the user is offline
GPT-6.1 Sol as an available model in Codex, as covered in our article on GPT-6.1 Sol

Who can use it

Plan	Access to cloud environments
ChatGPT Plus and Pro	Yes, with reduced resources (half the processors and memory compared with higher tiers)
Business, Enterprise, Edu, Healthcare	Yes, with full access

Today's limits

The service launches with some clear boundaries:

no GitLab and no self-hosted GitHub Enterprise installations in cloud environments
no browser-based coding or computer use inside cloud environments
a task recovery window of up to seven days

Why it matters

With dots OpenAI brings always-on agents to a general audience; with Codex Cloud it does the same for people who write software. The thread is the same: AI that does not wait in front of the screen, but works in parallel and returns a result to review. For a small team it means being able to leave fixes, tests and security scans in a queue and find them ready, as long as human review stays on everything that goes into production.