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Build anything with Codex

Move faster, go further, and bring your biggest ideas to life.

Trusted by top teams

Get started

Codex is included in your ChatGPT plan.

Plus

Includes Codex usage for focused coding sessions each week.

Pro

Higher usage limits to power full workdays across multiple projects.

Business

Secure, shared workspace with admin controls and flexible pricing for teams using Codex across repositories.

*For 2+ seats, billed annually
Unlimited subject to abuse guardrails. Learn more⁠(opens in a new window)

The best way to build with agents

Built to drive real engineering work

Give Codex your toughest engineering problems, from hard-to-find bugs to complex refactors and new features. Codex works efficiently, delivering high-quality results with fewer tokens.

Codex interface showing an engineering task with progress details and a changed-files review panel on a soft gradient background.

Designed for multi-agent workflows

Codex runs many agents in parallel, using computer and browser tools to verify work until your requirements are met. Follow progress, steer agents, and review results in one place.

Codex desktop workspace showing parallel agents working across projects on a gradient background.

Keep tasks moving in the cloud

Codex keeps going when you close your laptop, with reusable cloud environments for every repo. Start tasks, follow progress, and pick up where you left off from another device.

Codex mobile cloud view showing projects and tasks on a gradient background.

Scale code review confidently

Keep code changes moving as your team builds faster. Codex automatically reviews pull requests, surfaces findings, and answers questions, so you can focus where your judgment is needed most.

Codex code review showing a pull request discussion and review activity on a gradient background.

Bring Codex directly to your workflows

Connect your tools and add specialized capabilities with plugins. Give Codex the context and access it needs to take action across your apps and do more of the work for you.

The same agent everywhere you code

Use Codex across ChatGPT, your editor, and the terminal, all connected by your ChatGPT account.

Codex desktop app sidebar showing pinned and recent coding tasks.

Codex in ChatGPT

Codex code review showing edited files and a request to add tests.

Codex IDE extension

Codex command-line interface with a prompt to implement dark mode.

Codex CLI

What builders are saying

Codex app > Layout > Testimonials > daniel-sikorskiy 1

“At Wonderful, Codex CLI has completely replaced every other agentic harness for our core technology and architecture work requiring deep reasoning and understanding.”

Daniel Sikorskiy, Chief Architect, Wonderful

Codex app > Layout > Testimonials > joey wang

“At Harvey, Codex transformed how we build by cutting early iteration time by 30–50%, freeing engineers to focus on system design and high-leverage decisions.”

Joey Wang, Mobile Lead, Harvey

Codex app > Layout > Testimonials > tess-rosania 1

“With Codex, we ship in a weekend what previously took a quarter. It’s become our go-to for projects we wouldn’t have otherwise been able to take on.”

Tess Rosania, Software Engineer, Sierra

Codex app > Layout > Testimonials > austin-ray 1

“The recent Codex releases have been a step change. Codex PR reviews catch bugs our team would have missed, and we ship with more confidence because of it. Now we’re pulling the CLI and desktop app into more of our workflows—each release raises the bar.”

Austin Ray, AI Dev X Team Lead, Ramp

Codex app > Layout > Testimonials > dan-shipper 1

“Codex performed best in our backend Python code-review benchmark. It was the only one to catch tricky backward compatibility issues and consistently found the hard bugs that other bots missed.”

Aaron Wang, Senior Software Engineer, Duolingo

Codex app > Layout > Testimonials > tres-wong-godfrey 1

“I needed to update another team’s codebase for a release. Codex handled the refactor and test generation, delivering fully tested code I handed back fast—keeping the feature on schedule without added risk.”

Tres Wong-Godfrey, Tech Lead, Cisco Meraki

Start building with Codex

Now available in the ChatGPT app.