Codex
OpenAI coding agent for implementing, testing, and reviewing changes through ChatGPT, desktop, terminal, IDE, and cloud workflows.
At a glance
- Good for
- Code implementation · Code review
- Starting access
- Free and Go desktop access is limited and subject to rollout.
- Before you start
- Work on local code; installation, deployment and maintenance are yours.
Platforms
Desktop, CLI, IDE, Web, iOS
Put it to work
Browse task guidesCommon questions
Is Codex free?
There is a free way to start, and paid plans are also listed.
What platforms does Codex run on?
Codex lists Desktop, CLI, IDE, Web, iOS.
Who makes Codex?
OpenAI publishes Codex.
When was Codex last reviewed?
Official sources were reviewed on 2026-10-05.
What is Codex?
OpenAI coding agent for implementing, testing, and reviewing changes through ChatGPT, desktop, terminal, IDE, and cloud workflows.
Plans, access & official sources
Capabilities
Code editing and tests · Code review · Parallel agents · Browser and computer verification · CLI and IDE workflows · Cloud repository tasks
- Pricing
- Free and paid plans
- Access
- Desktop, CLI, IDE, Web, iOS
Free and Go desktop access is limited and subject to rollout. Paid ChatGPT plans add surfaces and cloud features; API-key CLI, SDK, and IDE usage is billed separately.
Codex · Local coding · Plus or billed API access
Plan details checked
- This recommendation uses the local CLI and requires installation and development setup.
- Free Codex desktop access is a separate rollout; the documented CLI workflow uses an eligible paid plan or separately billed API access.
- Native code needs a separate framework and device testing. You own deployment, credentials, and maintenance.
Review scope & sources
Provider information reviewed; this is not a hands-on product evaluation.
Official links are shown in the Official sources section above.
Catalog details are informational, not a performance ranking. How we review.