Repository-level implementation
Developers who want an agent to inspect a codebase, edit files, run tests and present a reviewable diff.
Independent tool overview
Codex App at a glance
Codex is OpenAI's agentic work and coding experience for running local and cloud tasks, reviewing file changes and coordinating parallel projects from the ChatGPT desktop app.
Visit the official Codex App site ↗
- Developer
- OpenAI
- Best for
- Parallel agentic coding and long-running desktop work
- Platforms
- macOS, Windows and Linux desktop apps
- Starting price
- Free; paid ChatGPT plans raise limits and access
Overview
What Codex App is
The product introduced as the Codex App has expanded into the broader ChatGPT desktop app. OpenAI's current documentation presents one desktop workspace where users can choose Codex, open a folder or project, work with local files and tools, and keep several long-running chats visible.
For software projects, Codex can inspect and edit repositories, run commands, review diffs and use isolated Git worktrees for parallel tasks. It can also delegate work to Codex cloud, then return a reviewable summary and code changes. The desktop app is available for macOS, Windows and Linux, while Codex also has web, CLI, IDE and cloud surfaces.
Use cases
Who Codex App is best for
The strongest fit depends on the job you need the product to complete, not the size of its feature list.
Parallel project work
Teams and individuals coordinating several independent tasks without losing the context or state of each chat.
Local and cloud handoffs
Users who want to start work locally, isolate it in a worktree or delegate a longer task to a cloud environment.
Capabilities
Core Codex App features
Desktop project workspace
Keeps projects, chats, files and long-running work visible in one app instead of limiting Codex to a terminal session.
Local repository access
Works with chosen folders and files, runs commands through an integrated terminal and presents code changes for review.
Parallel Git worktrees
Creates isolated worktrees so independent chats can work on the same repository without competing for one checkout.
Local-to-worktree handoff
Moves a chat and its code between the main checkout and an isolated worktree while handling the required Git operations.
Codex cloud delegation
Runs longer tasks in configured cloud environments and returns summaries, diffs and pull-request-ready work for review.
Reusable tools and workflows
Supports project instructions, skills, plugins, MCP connections and scheduled tasks according to the user's plan and configuration.
Process
How the Codex App workflow works
Step 1
Choose the project and environment
Open the repository and decide whether the task should use the local checkout, an isolated worktree or a cloud environment.
Step 2
Define a verifiable outcome
Describe the desired behavior, constraints, relevant files and checks that must pass rather than asking only for code generation.
Step 3
Let Codex inspect and execute
Allow only the permissions and tools the task needs while Codex reads, edits, runs commands and reports intermediate findings.
Step 4
Review the evidence
Inspect the summary, diff, terminal results and rendered behavior before committing, pushing, deploying or merging changes.
Cost
Codex App pricing and free plan
Codex is included with current ChatGPT Free, Go, Plus, Pro, Business, Edu and Enterprise plans. Usage depends on the model, task complexity and whether work runs locally or in the cloud; API-key use is billed separately by tokens and does not include cloud integrations.
Free / Go
$0 / $8 monthly
Entry access for quick or lightweight Codex tasks.
- Plan-dependent usage limits
- Suitable for smaller coding tasks
- Availability can vary by region and account
Plus
$20 monthly
Regular individual access for focused coding sessions.
- Codex across supported surfaces
- GPT-5.6 model family
- Cloud integrations and optional additional credits
Pro
From $100 monthly
Higher individual Codex limits for more intensive use.
- 5x or 20x Plus rate-limit options
- Research-preview model access can be plan-specific
- Tasks still consume a shared usage budget
Business
$20/user monthly annually
Managed workspace access for teams of two or more.
- $25 per user when billed monthly
- Administrative and security controls
- Business data is not used for training by default
Enterprise / Edu
Contact sales
Organizational deployment with expanded governance controls.
- Priority processing
- Audit and usage monitoring
- Retention, residency and identity controls
Pricing checked . Check current pricing at the source ↗
Assessment
Codex App strengths and limitations
Where it stands out
- Combines local files, commands, diffs and agent conversations in one desktop workspace.
- Worktrees make it practical to run several repository tasks in parallel with less checkout interference.
- Local, cloud, CLI, IDE and web surfaces support different stages of a development workflow.
- The free tier provides a low-friction way to test the product on small tasks.
What to consider
- Agent-generated code can be incorrect, insecure or incomplete even when tests pass, so human review remains essential.
- Usage is limited by plan, model, context and task complexity; large local or cloud jobs can consume allowances quickly.
- Granting broad filesystem, shell, network or connected-service permissions increases the impact of a mistaken action.
- Parallel worktrees reduce checkout conflicts but do not eliminate merge conflicts or integration work between tasks.
Compare
Codex App alternatives
The right alternative depends on the specific output, workflow, controls and budget your project requires.
Coding
Claude Code
Choose Claude Code for Anthropic's terminal-centered coding agent and its model ecosystem.
Explore Claude Code →Coding
Cursor
Choose Cursor when an AI-first code editor and inline IDE workflow are more important than a separate agent workspace.
Explore Cursor →Coding
Devin Desktop (formerly Windsurf)
Choose Devin Desktop, formerly Windsurf, to compare another agent-oriented desktop and editor workflow.
Explore Devin Desktop (formerly Windsurf) →Questions
Codex App FAQs
What is the Codex App?
The Codex App is OpenAI's desktop agent experience for working with repositories, files, commands and long-running tasks. Current official documentation presents Codex within the broader ChatGPT desktop app.
Is the Codex App still available?
Yes. Codex remains an active mode and product surface in the ChatGPT desktop app, which OpenAI currently offers for macOS, Windows and Linux.
Is the Codex App free?
Codex is included with ChatGPT Free and other current ChatGPT plans, but usage limits and available features vary. Go is $8 per month, Plus is $20 per month and Pro starts at $100 per month as of this review.
What are Codex worktrees?
Worktrees are isolated Git checkouts that let separate Codex chats work on the same repository in parallel without sharing one working directory.
Does a Codex subscription include API usage?
ChatGPT-plan usage and OpenAI API billing are separate. An API key can be used with Codex CLI, SDK or IDE workflows on usage-based token pricing, but it does not include plan-based cloud integrations.
Bottom line
Our Codex App verdict
Codex is strongest for developers who want more than inline completion: it can own a scoped implementation loop across repository inspection, edits, commands, verification and review. The desktop workspace and worktree model are particularly useful for parallel projects, but the value of higher plans depends on sustained usage and every consequential change still needs human verification.
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