Ease of use
8.8
Onboarding, navigation, and day-to-day workflow friction.
AI Coding Assistants
Codex
OpenAI's AI coding tool for coding agents, code review, ChatGPT plan access, Codex credits, and API billing paths.
Codex: OpenAI's AI coding tool for coding agents, code review, ChatGPT plan access, Codex credits, and API billing paths. Pricing: Bundled access. Best for Full-repo implementation, refactors, and debugging with tool use and Developers who want one coding agent across app, IDE, terminal, and web.
Tool score: 8.6 / 10
ChatGPT plan accessBundled accessBusiness workspace accessTeam pricingCodex-family API modelsUsage-based API
Free plan available
Tool scorecard
How the tool scores
A standardized tool profile score across usability, pricing value, feature depth, and support quality.
Tool score
8.6
/ 10Value for money
8.0
How much practical capability the product delivers for the price.
Features
9.4
Breadth, polish, and depth across the core product surface.
Support
8.2
Docs, help channels, and how easily issues get resolved.
Overview
Bottom line
What is Codex?
Codex is OpenAI's AI coding tool for software work: code generation, code review, debugging support, agentic coding tasks, and workflows that connect ChatGPT, developer tools, and API-backed automation.
Is Codex free?
Codex access depends on the current ChatGPT plan, Codex credits, team setup, and whether the work uses API billing. Treat free or low-cost access as limited until the workflow proves it has enough capacity.
Codex vs Claude Code, Cursor, GitHub Copilot, and Windsurf
Codex is strongest when the buyer already trusts OpenAI models and wants coding help tied to ChatGPT or OpenAI workflows. Compare Claude Code for terminal-first agent work, Cursor and Windsurf for IDE-native work, and GitHub Copilot for GitHub-centered coding teams.
Codex is OpenAI's coding agent for software work across local development, IDE-style assistance, repository tasks, reviews, debugging, and delegated cloud execution. It is best for developers and teams that want an agent to operate on real code, not just answer programming questions in a chat window.
Its strongest fit is implementation work where the agent can inspect files, propose changes, run checks, and explain tradeoffs. The caveat is that Codex sits across several access paths. ChatGPT plan access, Codex-specific usage, API keys, cloud tasks, and team billing can each behave differently, so a buyer should not assume one subscription covers every development workflow.
Use Codex when the job is shipping code with agent assistance. Keep ChatGPT workspace use, Codex agent sessions, automated CI or API usage, and organizational controls as separate purchase boundaries before comparing cost or rollout risk.
Pricing
How Codex pricing works
Access routes
Use this compact map to separate app subscriptions, API meters, team workspaces, and enterprise purchasing. Open the pricing page for detailed plan or API meter facts.
App subscriptionPrimary
ChatGPT plan access
Bundled access
Codex is included with eligible ChatGPT Free, Go, Plus, Pro, Business, Edu, and Enterprise plans. Treat ChatGPT plan prices as ChatGPT subscription facts; Codex-specific usage is governed by Codex credits and the official Codex rate card.
Team workspace
Business workspace access
Team pricing
Business and Enterprise Codex usage should be modeled through Codex credits and model-specific token rates, including GPT-5.5, GPT-5.4, GPT-5.4-Mini, GPT-5.3-Codex, and GPT-Image-2.0 on the official rate card. Do not model standard ChatGPT Business seat prices as Codex plan rows.
Direct API
Codex-family API models
Usage-based API
Programmatic coding-agent builds should use OpenAI developer pricing and Codex rate-card details, billed separately from ChatGPT plan access with model-specific token pricing rather than fixed subscription rows.
Capabilities
Input types
text, image, file, code
Output types
text, code, file, image
Supported platforms
Web, iOS, Mac, Windows, Linux
Delivery modes
Web app, Mobile app, Desktop app, CLI, IDE extension, API
Company context
Company
OpenAI
Founded
2015
Headquarters
San Francisco, California, USA
Category
AI Coding Assistants
FAQ
Common questions
How much does Codex cost?
Codex cost depends on access path. Free and Go can provide limited access, Plus is the first clear individual baseline, Pro adds more headroom, Business can use standard or Codex-only seats, and API-key usage is billed separately.
Is Codex the same product as ChatGPT?
No. ChatGPT is OpenAI's general assistant surface, while Codex is the dedicated coding agent surface for software work. Access is often packaged through ChatGPT plans, but the product role is different.
Which plans include Codex?
OpenAI includes Codex across ChatGPT plans with different limits and billing paths. Plus and Pro are the main individual routes, while Business and Enterprise can use standard ChatGPT seats, Codex-only seats, or workspace credits depending on setup.
Does Codex now use GPT-5.5?
Yes. OpenAI says GPT-5.5 is available in Codex for supported plans with a 400K context window. GPT-5.5 Fast mode is available when speed matters more than credit efficiency.
Are Codex plan limits the same as API pricing?
No. ChatGPT plan access, Codex usage limits, credits, and OpenAI API token bills are separate meters. API-key use should be modeled with API pricing rather than ChatGPT subscription pricing.
What is Codex?
Codex is OpenAI's AI coding tool for code generation, code review, debugging, and agentic software workflows across ChatGPT, developer surfaces, and API-backed usage paths.
Is Codex free?
Codex can have limited access through eligible ChatGPT paths, but serious use should be budgeted through the relevant ChatGPT plan, Codex credits, Business setup, or API billing route.
What is the best Codex plan?
The best Codex plan depends on usage. Occasional individual work can start lower, heavy coding sessions need more headroom, and teams should compare Business controls, Codex-only seats, and API automation.
Recent updates
Changelog snapshot
improvement
April 23, 2026gpt-5.5GPT-5.5 rolled out to Codex with 400K context, higher coding performance than GPT-5.4, better token efficiency for most users, and an optional Fast mode.
improvement
April 16, 2026Codex expanded beyond pure coding with computer use, in-app browsing, more plugins, memory, automations, image generation, and stronger PR-review workflows.
price-change
April 2, 2026Codex pricing began shifting from message-based estimates to token-based credit metering for Plus, Pro, Business, and new Enterprise workspaces.
feature
February 2, 2026OpenAI launched the Codex app and later expanded availability to Windows, making multi-agent desktop workflows a first-class surface.
Related reading
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Score
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Score
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The first agentic IDE, and then some.
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Read profileDecision rail
Keep the key facts, primary action, and section jumps visible while you evaluate the profile.
Visit Official Site
Last verified May 26, 2026
- Pricing
- Bundled access
- Platforms
- Web, iOS, Mac, Windows, Linux
- Access
- Web app, Mobile app, Desktop app, CLI, IDE extension, API
- Best for
- Full-repo implementation, refactors, and debugging with tool use and Developers who want one coding agent across app, IDE, terminal, and web and Teams that want multi-agent worktrees, reviews, and automations and OpenAI-centric workflows that need ChatGPT-linked access and separate API paths
- Category
- AI Coding Assistants
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Related pages
Open related pages for pricing, reviews, and adjacent coverage.
Review: Codex Review: Is OpenAI's GPT-5.5 Coding Agent Worth It?Codex is easier to recommend because GPT-5.5 brings stronger long-horizon coding, a 400K context window, and better token efficiency than GPT-5.4 for most users, but the product still asks buyers to navigate subscriptions, credits, and separate API billing.Pricing: Codex Pricing 2026: ChatGPT Access, Credits, and API CostsCodex pricing depends on access path: ChatGPT plan access, Codex credits, Business seat options, Codex-only seats, or separate OpenAI API billing. The right plan depends on usage volume and team workflow.Alternatives: Best Codex Alternatives in 2026Cursor, GitHub Copilot, and Windsurf are the clearest Codex alternatives if you want a more editor-first workflow, cheaper seat pricing, or a different balance between agent power and IDE convenience.
Head-to-head
Open direct comparison pages involving this tool.
VSCodex vs WindsurfCodex is the preferred default when the buyer wants an autonomous coding agent that can handle repo-level tasks, run commands, produce diffs, support cloud delegation, and plug into review workflows. Windsurf is the better switch when the real purchase is an AI-native IDE with autocomplete, Cascade, previews, local context awareness, model routing, and a tighter in-editor flow.VSCodex vs GitHub CopilotCodex should be the default when the team is buying for deeper agentic coding work: repository understanding, task execution, command-running, tests, code review preparation, and reviewable diffs. GitHub Copilot should lead when the team values GitHub-native IDE assistance, pull request workflow, seat administration, and organization policy more than standalone agent depth.VSCodex vs CursorCursor is the better default for most developers because it combines an AI-native editor, broader model choice, and stronger day-to-day workflow tooling. Codex is stronger for multi-agent delegation, cross-tool reach, and direct OpenAI API usage.VSCodex vs Claude CodeThis comparison is a real tie: Claude Code is stronger for local-first coding workflows and deployment flexibility, while Codex is stronger for cloud orchestration and supervisory multi-agent work.
Reference page
Standalone reference page and update history for this tool.
Same category
Nearby tools in the same lane.
ToolCursorAI code editor with agents, context-aware completion, Bugbot, and cloud workflows.ToolClaude CodeAnthropic's agentic coding assistant for terminal, IDE, browser, and automation workflows.ToolGitHub CopilotGitHub-native AI coding assistant for chat, code review, and agent workflows.ToolWindsurfThe first agentic IDE, and then some.
Reference links