1. Should you try OpenAI Codex? Overview

What it is	OpenAI Codex — Cloud-Native Coding Agent Bundled With ChatGPT (GPT-5.5, Multi-Surface, Not Shut Down) Not shut down.
Country / HQ	San Francisco, USA
Best for	Existing ChatGPT Plus/Pro users wanting agentic coding without new sub
Check before buying	Watch out: Devs who want self-hosted/local-first agent (Ollama+Codex CLI is API-only, no local weights)
Editor rating	4.7 / 5
Pricing signal	Free tier + paid from $8/mo

2. Features What it does

Feature	What it does
Surfaces	ChatGPT web (/codex), desktop app macOS+Win, CLI (npm i -g @openai/codex), VS Code ext (works in Cursor/Windsurf), JetBrains (IntelliJ/PyCharm/WebStorm/Rider), Xcode 26.3, iOS via ChatGPT app — One quota across all surfaces
Agent loop	Isolated cloud VM sandbox, git worktree per task, multi-agent parallel, run tests/linters, file PRs, auto code review on GitHub — Plus = local messages only, no cloud tasks; cloud starts at Plus? no — cloud tasks start at Plus paid tier includes cloud? correction: Free/Go local only, Plus includes cloud tasks + PR review (verify: OpenAI docs say Plus = cloud tasks yes; some reviewers misstate)
Models	GPT-5.5 (default), GPT-5.4, GPT-5.4 mini (high-volume), GPT-5.3-Codex-Spark (Pro-only research preview) — Token rate varies by model
Skills / Automations	Reusable task skills, unattended issue triage, CI alert monitoring, GitHub Action for CI — Team/Enterprise
Extras (Jun 2026)	Sites (host interactive web apps from repo, Business+), Annotations (in-place edit slices of doc/sheet/slide), Role plugins (IB/Marketing/Analyst/Investor/Design/Ops, 90+ app integrations: Slack, Drive, SharePoint, Atlassian) — Non-dev surfaced in
Protocol	MCP client+server, AGENTS.md context, computer use (macOS first, Apr 2026), cross-session memory — Windows/Linux computer use rolling
SCM	GitHub + GitLab native, no Bitbucket
API mode	codex CLI/SDK with API key → per-token billing, no cloud PR review/Slack, no 5h window

Plan	Price / mo	Key limits & who it fits
Free	$0	Limited local messages, no cloud tasks, no PR review, GPT-5.5 throttled
Go	$8/mo	Lightweight local CLI/web coding, no cloud delegation
Plus	$20/mo	Full Codex: web+CLI+IDE+iOS, cloud tasks, GitHub PR review, GPT-5.5, 5h window ~15-80 cloud tasks / 60-350 mini messages, weekly cap
Pro 5x	$100/mo	5× Plus usage, GPT-5.3-Codex-Spark, priority model access
Pro 20x	$200/mo	20× Plus, full ChatGPT Pro bundle, unlimited voice (tasks still draw quota)
Business	$25/user/mo (or $20 annual, min 2)	Team credit pool, larger VMs, SSO/MFA, no training on biz data, Sites/Annotations
Enterprise / Edu	Custom	SCIM, EKM, RBAC, audit logs, data residency (10 regions), 24/7 support
API key	Pay per token	GPT-5.5 ~$5/$25 per M in/out (Sol), Terra $2.5/$15, Luna $1/$6, cached input 10% rate; no cloud features

Access type	Details
Access	access_type: cloud-agent-multisurface access_display: 🌐 chatgpt.com/codex · 🖥️ macOS/Win desktop · ⌨️ CLI (Rust, Apache-2.0) · 🔌 VS Code/JetBrains/Xcode ext · 📱 iOS via ChatGPT · 🔑 API key

Source	Rating	What it says
AI Agent Index	4.7/5 — “autonomous end-to-end, best surface breadth, quota confusion”
No Code MBA	“Not best at any one thing, widest coverage; ~30% fail rate on complex tasks, needs checkpoints”
CloudZero	“$20 is on-ramp not ceiling; real bill $100-200/dev/mo token-metered; API beats Plus under ~10-40 sessions/mo”
CodeAgentSwarm	“Pro $100 tier easy to miss; one quota across CLI+web+IDE surprises parallel users”
Reddit r/OpenAI	“30-150 req/5h window on Plus, crazy good until you hit it; buy credits or wait”

✔ Suitable	✘ Not suitable
• Existing ChatGPT Plus/Pro users wanting agentic coding without new sub • Async background work: “fix failing test, run suite, open PR” while you sleep • Teams with GitHub PR review + Slack triage needs (Business+) • Mixed dev+non-dev workflows (analyst/IB/marketing plugins) • OpenAI-aligned stacks (Azure/Bedrock GPT-5.5 available) • Long-running refactors in sandboxed worktrees	• Devs who want self-hosted/local-first agent (Ollama+Codex CLI is API-only, no local weights) • Real-time inline completion addicts (Cursor better) • Bitbucket shops • Windows/Linux users wanting computer-use • Tight-budget solo who won’t watch token burn (API or Pro 5x sneaks up) • People who think $20/mo = unlimited (it’s 5h window + weekly cap)

Competitor	How it differs	Best for
Claude Code	Terminal-first agent, Opus/Sonnet, long-repo reasoning	$20/mo (Pro) / $100 Max 5x / $200 Max 20x
Cursor	IDE-first (VS Code fork), multi-model, tab+agent	$20/mo Pro / $60-80/mo Business
GitHub Copilot	Inline completion + lightweight agent, MS ecosystem	$10/mo Individual / $19 Business
Windsurf	IDE agent, SWE-style	$15-30/mo
Devin (Cognition)	Fully autonomous dev agent, ultraplan cloud	Team $80+/seat
Codeium / Tabnine	Completion-first, cheaper	Free / $15-20
Gemini Code Assist / Antigravity	Google Cloud agent	$19 seat Std / Antigravity Ultra $200
Aider	OSS terminal agent, local models	Free (API cost only)

Who should pick it	Existing ChatGPT Plus/Pro users wanting agentic coding without new sub
Who should skip it	Devs who want self-hosted/local-first agent (Ollama+Codex CLI is API-only, no local weights)