OpenAI Codex

OpenAI coding agent for building, reviewing, testing and shipping software across desktop, CLI, IDE and cloud

Research-based score

4.8

Tested

Features and capabilities5.0

Current OpenAI sources verify Codex across desktop, CLI, IDE, web/mobile and CI/CD, with parallel agents, worktrees, skills, plugins, browser/computer use, Goal mode, code review and cloud workflows.

Usability and implementation4.8

Codex is available directly in ChatGPT desktop and developer environments and supports local or cloud software-engineering tasks, though autonomous changes still require review before production.

Pricing and value transparency4.4

Codex is included across current ChatGPT plans with usage varying by tier; Plus is USD 20/month, Pro USD 100/month and ChatGPT Business standard seats USD 20 annual or USD 25 monthly, while usage beyond included limits can use credits.

Integrations, security and trust5.0

Business and Enterprise offer SAML SSO, MFA, administration, spend controls and no training on business data by default; OpenAI also publishes detailed usage and safety guidance for Codex.

Scored by Surabhi Singh

Quick facts

Vendor: OpenAI
Pricing model: freemium
Plan pricing: Included with ChatGPT Free; higher Codex usage is included with paid ChatGPT plans Vendor source checked; not a hands-on review
Free plan: Yes — check limits
Free trial: Not confirmed
Last verified: Not yet verified

About OpenAI Codex

OpenAI Codex is an agentic software-development product that can write, review, debug, test and ship code. Current Codex works through the ChatGPT desktop app, CLI, IDE extensions, web and mobile surfaces and CI/CD or SDK workflows. It can run multiple agents in parallel, use isolated worktrees, browse, use computer tools, follow durable goals and extend itself with plugins and reusable skills. Codex is included across current ChatGPT plans, with usage limits determined by plan and optional credits.

Best for

Developers and engineering teams that want an agent capable of working across repositories, terminal tools, IDEs and longer-running software-engineering tasks rather than only generating code snippets in chat.

OpenAI Codex pros and cons

Pros

Codex can work across desktop, terminal, IDE, web and cloud contexts rather than being limited to a single editor or chat surface.
The desktop app supports multiple agents in parallel and isolated worktrees, helping developers delegate separate tasks without creating repository conflicts.
Skills and plugins extend Codex beyond raw code generation into repeatable engineering, deployment, documentation and tool-connected workflows.
Goal mode, browser tools and computer-use capabilities support longer end-to-end tasks that span coding, testing, frontend review and external tools.
ChatGPT Business provides SSO, MFA, centralized administration, spend controls and no training on business data by default alongside Codex access.

Cons

−OpenAI recommends human review before production because autonomous code changes, tests and tool actions can still be incorrect or unsafe.
−Usage limits differ materially by Free, Plus, Pro and Business tiers and can be difficult to translate into a fixed number of coding tasks because task size and model choice affect consumption.
−Extra Codex usage can draw from purchased credits, adding variable cost after included plan allowances are exhausted.
−The older pay-as-you-go Codex-only Business seat model is now legacy and unavailable to new Business workspaces, which can make older pricing references misleading.
−G2 does not currently expose a dedicated OpenAI Codex product profile in the retrieved OpenAI seller listing, so SearchSagar does not substitute ChatGPT or OpenAI seller ratings as a Codex-specific score.

Features

Codex Desktop App

Current ChatGPT plans with plan-dependent limits · Desktop feature rollout and models vary by plan.

Git Worktrees

Codex app and current CLI workflows · Repository structure and Git discipline still matter.

Goal Mode

Codex app, IDE and CLI · Goals still require user supervision and review.

IDE Extension

Current Codex access · Editor support and extension versions change over time.

Codex CLI

Included with current ChatGPT plans or separate API-key usage · Local shell permissions should match task risk.

Parallel Agents

Codex app · Parallel work consumes usage faster and should be coordinated carefully.

Code Review

Current Codex workflows · OpenAI recommends using Codex as an additional reviewer rather than replacing human review.

Skills and Plugins

Current Codex plugin ecosystem · External service permissions and plugin availability apply.

Cloud Tasks

Current Codex service · Cloud task access and usage limits depend on plan.

Browser and Computer Use

Eligible desktop and workspace configurations · Permissions, region, platform and workspace policy restrictions apply.

Platforms

IDE extensionsCLISDK/CIAndroidWindowsWebiOSmacOS

Integrations

Cloudflare Render Figma Linear GitHub Vercel Netlify

Pricing

ChatGPT Free

Free

USD 0.00/month with annual billing

Current free ChatGPT access includes Codex with lower usage limits. Limit: Lower Codex allowance Limit: Model access differs from paid tiers Billing unit: per user Minimum seats: 1

Codex access
Entry-level usage

ChatGPT Plus

USD 20.00/month

Paid individual plan for steady day-to-day Codex usage. Limit: Usage limits vary with task and model Billing unit: per user/month Minimum seats: 1 Minimum commitment: Monthly

Higher Codex usage than Free
Advanced models
Desktop, CLI, IDE and cloud access
Eligible credit top-ups

ChatGPT Pro 100

USD 100.00/month

Current Pro tier aimed at longer and higher-intensity Codex sessions. Limit: Usage still subject to plan allowance and guardrails Billing unit: per user/month Minimum seats: 1 Minimum commitment: Monthly

Higher Codex allowance
Pro model access
GPT-6 Astra in eligible Codex workflows

ChatGPT Business Standard

USD 25.00/month

USD 20.00/month with annual billing

Secure team workspace with included Codex and shared credit options. Limit: Included Codex usage varies; extra eligible usage can consume workspace credits Billing unit: per seat/month Minimum seats: 2 Minimum commitment: Monthly or annual

Codex
ChatGPT Work
SSO
MFA
Administration
Spend controls

ChatGPT Business Premium

USD 125.00/month

USD 100.00/month with annual billing

Higher-usage Business seat with expanded access for Codex and other premium workflows. Limit: Usage remains subject to abuse guardrails and workspace controls Billing unit: per seat/month Minimum seats: 2 Minimum commitment: Monthly or annual

Everything in Business Standard
5x more usage than standard
No five-hour limit according to current Business pricing

Enterprise

See pricing details

Custom enterprise ChatGPT and Codex deployment with organization-level controls. Limit: Custom quote required Billing unit: custom Contact sales for a quote.

Codex
Enterprise security
Admin controls
Model governance
Custom commercial terms

Official pricing / availability source · Checked 23 September 2026. Confirm current taxes, regional terms and allowances. A listed plan is not necessarily the cheapest option.

Editorial verification: Not yet verified. Check the vendor's site for current pricing.

Read the full OpenAI Codex pricing article

Alternatives to OpenAI Codex

ChatGPT

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Claude

AI assistant for writing, research, analysis, coding and long-context work

Gemini

Google AI assistant for research, reasoning, files, media and connected apps

Grok

Real-time AI assistant for search, reasoning, voice, media, coding and connected apps

Read the full OpenAI Codex alternatives article

OpenAI Codex — frequently asked questions

What is OpenAI Codex used for?

OpenAI Codex is an AI software-engineering agent used to build features, fix bugs, review code, run tests, refactor repositories and automate technical workflows. It works through desktop, CLI, IDE, web and cloud surfaces and can coordinate longer tasks with goals, worktrees, browser or computer tools and reusable skills rather than only generating isolated code snippets.

How much does OpenAI Codex cost?

Codex is included across current ChatGPT plans instead of being sold as one standalone consumer subscription. Free has limited access, Plus costs USD 20 per month, current Pro USD 100 per month and ChatGPT Business Standard costs USD 25 monthly or USD 20 annual-equivalent per seat. Additional eligible usage can draw from purchased credits, and Enterprise is custom.

Can Codex work directly in my repository?

Yes. Codex can read and modify local repositories through the desktop app, CLI and IDE integrations, run terminal commands and tests, and use Git worktrees for isolated parallel changes. It can also handle longer cloud tasks. Because these actions can materially change software, developers should use appropriate approvals, branches, tests and human review before merging or deploying generated changes.

Does Codex support parallel agents?

Yes. The Codex desktop app supports multiple agent threads organized by project and can use isolated Git worktrees so agents work on separate copies without immediately conflicting. This is useful for delegating a feature, bug fix and test task at the same time, although parallel agents consume more usage and still need coordination before their changes are combined.

Is OpenAI Codex secure for business use?

ChatGPT Business provides SAML SSO, MFA, centralized administration, spend controls and a secure workspace, and OpenAI states that business data is not used to train models by default. Enterprise adds further governance and custom commercial controls. Teams should still apply repository permissions, least privilege, branch protection, secrets management and code-review policies appropriate to their software-development risk.

Does G2 have a rating for OpenAI Codex?

The current G2 OpenAI seller profile lists thousands of reviews across OpenAI products, especially ChatGPT, but the retrieved product listing does not expose a dedicated OpenAI Codex review profile or Codex-specific star rating. SearchSagar therefore does not reuse the broader OpenAI seller average or ChatGPT rating as if it were independent customer validation for Codex.