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OpenAI Codex
by OpenAI Codex
What OpenAI Codex is
OpenAI Codex is a paid AI coding partner for engineering work, including bug finding, code refactoring, and feature development. It combines chat assistance with a coding agent, codebase indexing, terminal access, and agent mode. You can use it through ChatGPT, an IDE extension, the CLI, or the web with a ChatGPT account. Listed IDE integrations include Visual Studio Code, Visual Studio Code Insiders, Cursor, Windsurf, Xcode, and JetBrains IDEs, while platforms include extension, Linux, macOS, web, and Windows. Codex can run agents in parallel, letting you follow progress, steer work, and review results together. Cloud tasks continue after you close your laptop through reusable environments for each repository. It can automatically review pull requests, show findings, and answer questions. Plugins connect tools to its workflows. A free ChatGPT plan includes limited access; paid plans include Plus at $20 a month, Pro at $100 a month, and Business at $20 per user per month, billed annually for two or more seats.
Who it suits
Codex suits developers and engineering teams working across repositories, IDEs, terminals, and cloud tasks. Teams needing parallel agents, pull-request review, or business workspace controls may also find it suitable.
What it does well
- Supports parallel agents with progress controls
- Works with major IDEs and operating systems
- Provides terminal access and codebase indexing
- Continues cloud tasks after laptop closure
- Free ChatGPT plan includes limited access
What to know first
- Free access is limited
- Paid plans include recurring monthly costs
- Business annual billing requires two or more seats
Plans
| Plan | Billed and limits | Price |
|---|---|---|
| Business Standard | 2–200 employees · Unlimited subject to abuse guardrails | On request |
| Business Premium | 2–200 employees · Unlimited subject to abuse guardrails | On request |
| Enterprise | Enterprise-grade security and controls · 24/7 priority support · Custom legal terms and SLAs | On request |
| Pro | $100 / month · Higher usage limits for full workdays across multiple projects | $100 a month |
| Plus | $20 / month · Focused coding sessions each week | $20 a month |
| Business | $20 / user / month; for 2+ seats, billed annually · Unlimited subject to abuse guardrails | $20 a month |
As openai.com lists them, read 20 Sept 2026. The maker's own page has the final word.
Verdict
OpenAI Codex combines coding assistance, agent workflows, cloud continuation, and pull-request review in one service. Its platform and IDE coverage is broad, but users should check which plan and usage limits fit their work.
Facts from OpenAI Codex's own pages
- Coding agent
- Yes · openai.com, 20 Sept 2026
- Business controls
- The Codex Business offering is described as a shared workspace with admin controls and flexible pricing for teams working across repositories. · openai.com, 11 Oct 2026
- Business data
- OpenAI says it will not train on ChatGPT Business workspace data. · help.openai.com, 11 Oct 2026
- Chat assistance
- Yes · openai.com, 20 Sept 2026
- Cloud tasks
- Codex continues tasks in the cloud after the user closes their laptop, using reusable cloud environments for each repository. · openai.com, 11 Oct 2026
- Codebase indexing
- Yes · openai.com, 20 Sept 2026
- Code review
- Codex can automatically review pull requests, surface findings, and answer questions. · openai.com, 11 Oct 2026
- Founded
- 2015 · openai.com, 28 Sept 2026
- Free access
- The Free ChatGPT plan includes limited Codex access. · chatgpt.com, 11 Oct 2026
- Free plan
- No · openai.com, 20 Sept 2026
- Maker
- OpenAI consists of the nonprofit OpenAI Foundation and the for-profit OpenAI Group, which operates as a public benefit corporation. · openai.com, 11 Oct 2026
- Parallel agents
- Codex can run many agents in parallel and lets users follow progress, steer agents, and review results in one place. · openai.com, 11 Oct 2026
- Purpose
- Codex is an AI coding partner for engineering work such as finding bugs, refactoring, and building features. · openai.com, 11 Oct 2026
- Security
- OpenAI says infrastructure for its products uses encryption in transit and at rest, change management, and strict access controls. · openai.com, 11 Oct 2026
- Support
- OpenAI links users to its Help Center and service status page for support resources. · openai.com, 11 Oct 2026
- Supported IDEs
- Visual Studio Code; Cursor; Windsurf; Visual Studio Code Insiders; Xcode; JetBrains IDEs · openai.com, 20 Sept 2026
- Terminal access
- Yes · openai.com, 20 Sept 2026
- Ways to use
- OpenAI says Codex is available across ChatGPT, an IDE extension, the CLI, and the web, connected by a ChatGPT account. · openai.com, 11 Oct 2026
- Workflow integrations
- Codex supports plugins that connect tools and add specialized capabilities to its workflows. · openai.com, 11 Oct 2026
Where OpenAI Codex stands on Freedom251
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