What Is The Difference Between Codex Local Tasks And Cloud Tasks?

Local tasks run the Codex agent directly on your machine inside a sandboxed environment, giving you full filesystem access within your workspace. Cloud tasks run in OpenAI's hosted cloud environments and support integrations like automatic GitHub PR reviews and Slack delegation — these are only available on Plus and higher plans.

How Does AGENTS.md Customize Codex Behavior For A Codebase?

AGENTS.md files are placed in your repository root or nested subdirectories to inject project-specific instructions — such as coding standards, tech stack preferences, and workflow conventions — directly into every Codex session. This allows the agent to follow team-specific patterns without needing to re-explain context in every prompt.

Can Codex Operate Multiple Tasks In Parallel Across Different Projects?

Yes. The Codex desktop app uses built-in Git worktrees to let agents work simultaneously across separate project branches and threads. Each parallel agent runs in an isolated environment so tasks do not interfere with one another, enabling weeks of engineering work to be completed in days.

What Models Power OpenAI Codex And How Do They Differ?

Codex currently runs on GPT-5.5, GPT-5.4, GPT-5.4 mini, and the research-preview GPT-5.3-Codex-Spark. GPT-5.5 is the most capable for complex coding and uses fewer tokens per result, providing higher quality with generous limits. GPT-5.4 mini is optimized for high-volume routine local messages where speed and cost efficiency matter most.

How Does Codex Integrate With GitHub For Automated Code Reviews?

Codex connects to GitHub repositories through the cloud integration available on Plus and higher plans. Once enabled, you can tag @Codex in any pull request for an AI-driven review, or configure automatic reviews to trigger on every new PR. Codex catches bugs, compatibility issues, and code quality problems before human reviewers see the diff.

Listed · Reviewed Jun 2026 · 7-criteria rubric

AI Productivity Tools

OpenAI Codex

Name: OpenAI Codex
Availability: InStock
Author: OpenAI

OpenAI's Autonomous Coding Agent That Ships Real Engineering Work

by OpenAI · San Francisco, CA, USA · Founded 2015

Visit OpenAI Codex →

Pricing

Free tier available; Plus at $20/mo, Pro from $200/mo

What is OpenAI Codex?

OpenAI Codex is an AI-powered coding agent built directly into ChatGPT, designed to handle real engineering tasks end to end — from writing features and fixing bugs to complex refactors, migrations, and automated pull request reviews.

Powered by frontier models like GPT-5.5 and GPT-5.4, Codex operates across the web, a native desktop app, a terminal CLI, and IDE extensions.

It runs tasks in parallel using isolated cloud and local sandboxed environments, integrates natively with GitHub, Slack, and Linear, and adapts to each team's codebase through customizable AGENTS.md instructions and Skills.

OpenAI Codex — OpenAI's Autonomous Coding Agent That Ships Real Engineering Work Whether you're evaluating OpenAI Codex for your team or comparing it to alternatives in the AI Productivity Tools category, this in-depth review covers everything: features, pricing, real user reviews, pros and cons, integrations, and direct comparisons against competitors.

Key Features 8

AI-Powered Coding Agent that Builds, Refactors, and Ships Code End-to-End

Multi-Agent Parallel Workflows with Built-In Worktrees and Cloud Environments

Skills System to Extend Codex Beyond Code into Any Knowledge Workflow

Automations for Scheduled Background Tasks Like Issue Triage and CI/CD Monitoring

Role-Specific Plugins for Data Analytics, Sales, Design, Finance, and More

Inline Annotations to Precisely Refine Code, Documents, and Sites After Generation

Sandboxed Secure Execution with Configurable Permissions and Network Controls

Available Across App, CLI, IDE Extension, and Web via ChatGPT Subscription

Who Is OpenAI Codex For

1 Software Engineers And Full-Stack Developers

2 DevOps Engineers

3 Engineering Team Leads And CTOs

4 Open-Source Contributors

5 Platform And Infrastructure Engineers

Pros & Cons

Pros 4 benefits

Deep GitHub Native Integration
True Parallel Multi-Agent Execution
Cross-Surface Unified Account
Rapid Weekly Release Cadence

Cons 3 limitations

Usage Limits Reset Every 5 Hours
Computer Use Regionally Restricted
Cloud Tasks Limited To Plus+

Frequently Asked Questions

5 questions

Who is OpenAI Codex for?

OpenAI Codex is most useful for Software Engineers And Full-Stack Developers, DevOps Engineers, Engineering Team Leads And CTOs and Open-Source Contributors.

OpenAI Codex pricing

OpenAI Codex uses a freemium model: a usable free tier with optional paid upgrades. Headline pricing: Free tier available; Plus at $20/mo, Pro from $200/mo. For the current tier breakdown and any limits, see the pricing section above or check the vendor's pricing page directly — limits and prices change.

Trusted Reviews

Verified Platforms

4.6 G2 (2,698)

What's New

weekly

Record & Replay And Encrypted Noise Relay Channels Codex App 26.616 / CLI 0.141.0

Added Record & Replay on macOS to turn demonstrated workflows into reusable skills. Remote executors now use authenticated, end-to-end encrypted Noise relay channels for secure cross-platform execution.

Jun 18

Claude Code Import, Amazon Bedrock Auth, And /Usage Dashboard Codex CLI 0.140.0

Added /import for migrating setup and project config from Claude Code, managed Amazon Bedrock API-key authentication with encrypted local storage, and /usage views for daily and weekly account token activity.

Jun 15

View all updates

User Base

500M+ ChatGPT users globally

Active Users

Security & Privacy

US, EU (Enterprise residency controls available)

SOC 2 Type II GDPR Compliant CCPA Compliant

OS-Enforced Sandbox With Workspace-Scoped Filesystem Access End-To-End Encrypted Noise Relay Channels For Remote Execution SAML SSO And MFA For Business And Enterprise Plans SCIM, EKM, And Domain Verification (Enterprise) Role-Based Access Control (RBAC) With Custom Roles Compliance API And Full Audit Logs (Enterprise)

Collaboration & Teams

Team Workspaces Multi-User Access Role Permissions Shared Projects Real-time Comments Version History Activity Log

Learning & Support

Resources

Documentation Video Tutorials Blog

Community

Forum

Support Channels

Email Priority Dedicated Manager Onboarding

Localization

UI Languages

50+

Content Languages

Multi-Language UI

Recognition & Trust

Featured on PH VC Funded Open Source

Product Hunt: #2 Product Of The Month — August 2021

Awards: Time100 Most Influential Companies 2024

Media: Featured In The Verge, TechCrunch, Wired, MIT Technology Review

All Features of OpenAI Codex