Codex Desktop
OpenAI's Codex desktop app for managing coding agents
Install with Homebrew
brew install --cask codex-appQuick Take: Codex Desktop
NaNThe standalone Codex macOS app is historical as of 2026-07-09: merged into ChatGPT desktop's Chat + Work + Codex shell. Do not buy, install, or document it as a current separate product. Migrate to ChatGPT for Mac (or Windows), use Codex there on GPT-5.6 Sol/Terra/Luna, and price via ChatGPT Free/Go/Plus/Pro/Business/Enterprise. The agent workflow (sandboxes, parallel tasks, GitHub PRs) continues; only the dedicated app packaging is gone. This page exists for search demand and migration clarity, not as an install recommendation.
Best For
- •People searching "Codex app" who need the July 2026 merge/migration story
- •Teams updating runbooks from standalone Codex to ChatGPT desktop
- •Developers comparing Codex-in-ChatGPT vs Claude Code / Cursor / Muse Code
- •Anyone verifying that there is no separate Codex Mac SKU anymore
What was the Codex macOS app?
The standalone Codex macOS app was merged into the rebuilt ChatGPT desktop app on 2026-07-09 and is no longer a separate product. OpenAI folded Chat, ChatGPT Work, and Codex into one unified desktop shell for macOS and Windows. Existing Codex app users update into that ChatGPT client rather than installing a dedicated Codex binary. This page remains for search demand from people still looking for "Codex app," Homebrew cask names, or older tutorials, but the living product is Codex inside ChatGPT (desktop, web, CLI, IDE extension), not a freestanding Codex desktop app. Historically, the Codex macOS app (research preview through early 2026) was OpenAI's dedicated command center for autonomous coding agents: cloud sandboxes, parallel tasks, Git worktrees, GitHub pull requests, and later computer-use style browsing. Those capabilities did not disappear. They moved into the ChatGPT desktop experience under Work and Codex surfaces, now powered mainly by the GPT-5.6 family (Sol, Terra, Luna) after GA on 2026-07-09. Treat any guide that still markets a separate "OpenAI Codex desktop app" install as superseded. If you arrived here wanting to "download Codex for Mac," install or update the official ChatGPT desktop app instead, sign in with the same OpenAI account, and open Codex / Work from the unified shell. Pricing is ChatGPT-plan based (Free/Go limited trial, Plus ~$20/mo expanded Codex, Pro from $100/mo 5x or $200/mo 20x for maximum Codex tasks, plus Business/Enterprise). There is no standalone Codex app SKU. Confirm live limits on chatgpt.com/codex/pricing and openai.com/chatgpt/pricing.
Key Features
Merged into ChatGPT desktop (July 2026)
As of 2026-07-09 the dedicated Codex macOS app is superseded. Codex agent workflows, task queues, sandbox runs, PR creation, live inside the rebuilt ChatGPT desktop app alongside Chat and Work. Migration path: update to the new ChatGPT client; do not hunt for a separate Codex .dmg as a current product.
Work mode + coding agents
ChatGPT Work handles multi-step professional tasks. Codex focuses on software engineering agents that plan edits, run tests, and iterate on failures. Together they replace the old single-purpose Codex window with modes inside one shell.
GPT-5.6 Sol / Terra / Luna
Codex tasks in ChatGPT run on the GPT-5.6 family after July 2026 GA. Sol covers hard reasoning, Terra is the balanced default, and Luna handles cheaper high-volume runs (further cut ~80% on Luna and ~20% on Terra API-side around 2026-07-30). Do not treat superseded chat models or GPT-5.5 as the current primary Codex stack.
Autonomous sandboxed coding
Agents still execute in isolated cloud sandboxes: clone repo, install deps, run tests, iterate on failures. Your local machine stays untouched unless you use complementary local CLI/IDE surfaces.
GitHub PRs and code review
Codex creates branches and commits, then opens pull requests. @Codex-style review flows and automated review credits remain part of the ChatGPT Codex story rather than a separate app entitlement.
Parallel multi-agent task queues
Queue multiple independent tickets; each gets its own sandbox. The unified desktop UI monitors progress that previously lived only in the standalone Codex dashboard.
CLI and IDE companions
Beyond desktop, Codex continues via the web product, CLI, and IDE extensions. Search intent for "Codex app" often resolves to that multi-surface product, not a single Mac package.
Who Should Use Codex Desktop?
1Former Codex app user
You installed openai-codex via Homebrew before the July 2026 desktop merge. After July 9, update to ChatGPT desktop, sign in, and continue the same GitHub-connected agent tasks under Codex/Work instead of launching a separate Codex icon.
2Engineering manager clearing backlog
Delegate well-scoped tickets, validation, tests, small features, to Codex sandboxes overnight, review PRs in the morning inside the ChatGPT desktop Codex surface or on GitHub.
3Solo developer
Use Plus or Pro ChatGPT for expanded Codex tasks while keeping architecture decisions in Chat/Sol; stop maintaining a second OpenAI desktop binary.
4Open source maintainer
Point Codex at reproducible bug reports; agents ship fix PRs with tests while you focus on roadmap issues that need human judgment.
How to get Codex on Mac after the merge
Do not install a standalone Codex macOS app as a current product. Install or update ChatGPT for Mac, then use Codex inside it. Older Homebrew cask names may redirect or be obsolete, prefer the official ChatGPT desktop download or `brew install --cask chatgpt`.
Install ChatGPT desktop
Download from OpenAI/ChatGPT desktop channels or run brew install --cask chatgpt. Prefer the July 2026+ unified build (Chat + Work + Codex), not ChatGPT Classic alone if both are present.
Sign in and open Codex
Sign in with your OpenAI/ChatGPT account. Open the Codex (and Work) surfaces in the unified shell. Connect GitHub if you need branch/PR workflows.
Retire the standalone Codex app
If an old Codex app remains, uninstall it after confirming tasks and threads appear in ChatGPT desktop. Keep bookmarks pointing at chatgpt.com/codex for web access.
Optional: CLI / IDE
For terminal or editor-native loops, install Codex CLI or the IDE extension documented by OpenAI, these complement desktop, they do not revive a separate Codex Mac app SKU.
Pro Tips
- • Search results saying "brew install openai-codex" are historical; verify cask status before scripting installs.
- • Atlas discontinuation news from the same July 9 product push is unrelated, Atlas was a browser, Codex was the coding app; both fold into ChatGPT desktop narratives.
- • Confirm plan limits on chatgpt.com/codex/pricing before assuming Plus covers your backlog volume.
Configuration Tips
Write ticket-quality task prompts
Agents still reward specificity: acceptance criteria, file hints, and test expectations beat vague "improve the API" prompts.
Prefer Luna/Terra for volume, Sol for hard tasks
After the late-July GPT-5.6 price-performance cuts, route high-volume mechanical work to cheaper Luna-class runs and reserve Sol for tricky multi-file reasoning when your plan allows.
Keep Git hygiene
Review every PR; never auto-merge agent output on protected branches. Treat Codex like a capable junior teammate.
Migrate mental model from "app" to "surface"
Bookmarks and onboarding docs should say "open Codex in ChatGPT desktop," not "launch the Codex app." Runbooks that still point at a separate .dmg create support tickets after the July 2026 merge.
Alternatives to Codex Desktop
If you wanted a dedicated coding agent desktop/CLI experience, these compete with Codex-inside-ChatGPT rather than with a revived standalone Codex Mac app.
ChatGPT (unified desktop)
The official successor surface: Chat + Work + Codex in one Mac/Windows client. This is the migration target for former Codex app users, not a competitor.
Claude Code
Local/terminal interactive agent from Anthropic. Prefer when you want pair-programming loops in your own shell rather than cloud sandboxes and ChatGPT plan quotas.
Cursor Composer 2.5
IDE-native multi-file agentic editing. Strong when you live in the editor all day; Codex remains stronger for fire-and-forget cloud PR workflows.
GitHub Copilot CLI (agentic)
Agentic CLI tied to GitHub's ecosystem. Choose when Copilot billing and GitHub-native agent flows matter more than ChatGPT Codex sandboxes.
Meta Muse Code
Terminal coding agent launched August 2026 for macOS/Linux. Another dedicated agent CLI option if you are leaving OpenAI's stack entirely.
Pricing
There is no separate Codex desktop subscription after the merge. Codex usage follows ChatGPT plans: Free/Go offer limited trial-style Codex access; Plus (~$20/month) expands Codex capacity for regular professional use; Pro starts around $100/month for roughly 5× usage headroom or $200/month for roughly 20× maximum Codex task volume; Business and Enterprise add workspace controls and higher ceilings. API/metered developer pricing for Codex-related compute is documented separately (developers.openai.com/codex/pricing). Always verify live cards on https://chatgpt.com/codex/pricing/ and https://openai.com/chatgpt/pricing, limits and multipliers change.
Pros
- ✓Codex capabilities survive inside ChatGPT desktop, so agent workflows continue after the merge
- ✓One OpenAI Mac install covers Chat, Work, and coding agents
- ✓GPT-5.6 Sol/Terra/Luna stack with improved Luna economics for volume tasks after late July 2026
- ✓Cloud sandboxes and GitHub PRs remain the core async coding loop
- ✓Plan-based access (Plus/Pro/Business) without a second product SKU to manage
Cons
- ✗Standalone Codex macOS app is gone, bookmark and Homebrew muscle memory break
- ✗Weekly/plan credit limits still constrain heavy Plus users; Pro pricing is steep
- ✗Historical tutorials and cask names create install confusion for newcomers
- ✗Cloud sandbox model still cannot freely reach local-only or air-gapped resources
Community & Support
Primary docs shifted to ChatGPT help/learn surfaces: macOS app release notes, learn.chatgpt.com what's-new, and Codex pricing pages. Developer threads on X and forums often discuss the July 9 desktop rebuild (Chat/Work/Codex) alongside Atlas sunset news. Read carefully so you do not confuse browser discontinuation with the Codex merge. For coding-agent tips, communities still share AGENTS.md patterns, task templates, and PR review checklists that apply equally to Codex-in-ChatGPT.
Frequently Asked Questions about Codex Desktop
About the Author
Expert Tips for Codex Desktop
Rewrite internal docs from "install Codex.app" to "open Codex in ChatGPT desktop." Most support tickets after July 2026 are naming confusion, not missing features.
Budget Codex work on Plus first; only jump to Pro $100/$200 when weekly task caps block backlog burn-down. Luna-class volume after the July 30 cuts makes mechanical tickets cheaper to run when available on your plan.
Keep Claude Code or Cursor Composer for interactive local loops; use Codex-in-ChatGPT for async sandbox PRs. The merged desktop app does not erase the need for IDE-native agents.
Related Technologies & Concepts
Related Topics
AI Coding Agents
Autonomous and interactive agents that implement and review code.
ChatGPT Desktop Ecosystem
Unified ChatGPT Mac/Windows client absorbing Work and Codex.
Sources & References
Fact-CheckedLast verified: Aug 9, 2026
Key Verified Facts
- The standalone Codex macOS app was merged into the rebuilt ChatGPT desktop app (Chat + Work + Codex) effective 2026-07-09 and should be treated as superseded.[cite-1, cite-2]
- GPT-5.6 Sol, Terra, and Luna reached general availability around 2026-07-09 and are the current primary model family for ChatGPT/Codex work.[cite-4]
- OpenAI advanced GPT-5.6 price-performance with large Luna (~80%) and Terra (~20%) reductions around 2026-07-30.[cite-5, cite-2]
- Codex usage is priced through ChatGPT plans and Codex-specific pricing pages, not a standalone Codex desktop SKU.[cite-3, cite-7, cite-8]
- Press coverage of OpenAI's 2026-07-09 desktop product push discusses the rebuilt ChatGPT app context that includes Work/Codex alongside Atlas discontinuation news.[cite-6]
- 1ChatGPT macOS app release notes
Accessed Aug 9, 2026
"Official macOS release notes covering the rebuilt desktop client direction that absorbs Codex into the unified ChatGPT shell."
- 2What's new | ChatGPT Learn
Accessed Aug 9, 2026
"Product what's-new notes for desktop availability, Work/Codex surfaces, and GPT-5.6 related updates."
- 3Codex pricing in ChatGPT
Accessed Aug 9, 2026
"Plan-based Codex usage guidance across Free/Go/Plus/Pro and higher tiers, no standalone Codex app SKU."
- 4Introducing GPT-5.6
Accessed Aug 9, 2026
"GPT-5.6 Sol, Terra, and Luna family general availability announcement (2026-07-09)."
- 5Advancing the price-performance frontier with GPT-5.6
Accessed Aug 9, 2026
"Documents Luna ~80% and Terra ~20% price cuts reinforcing volume economics (late July 2026)."
- 69to5Mac: OpenAI discontinuing Atlas / desktop push
Accessed Aug 9, 2026
"Same-day coverage of OpenAI's July 9 desktop product push mentioning Work and Codex in the rebuilt ChatGPT app context."
- 7ChatGPT pricing
Accessed Aug 9, 2026
"Official ChatGPT plan ladder used for Codex entitlement after the standalone app merge."
- 8Codex developer pricing
Accessed Aug 9, 2026
"Developer-facing Codex pricing documentation for API/metered and related compute guidance."
Research queries: Codex macOS app merged ChatGPT desktop 2026-07-09; ChatGPT Codex pricing Plus Pro 2026; GPT-5.6 Sol Terra Luna Codex