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ChatGPT vs OpenAI Codex

Features, pricing, ratings, and pros and cons, side by side.

ChatGPT logo

ChatGPT

OpenAI's AI assistant for writing, research, coding, image generation and voice chat

4.0(1 review)Freemium
Visit websiteView details
OpenAI Codex logo

OpenAI Codex

OpenAI's coding agent that writes, reviews and runs code from terminal, IDE, desktop or cloud

Freemium
Visit websiteView details

Verdict

ChatGPT is listed under AI Assistants and OpenAI Codex under Coding AI. ChatGPT scores higher in FinderAtlas's editorial review (8.9 vs 8.5 out of 10), led by ecosystem & integrations. Both have a free plan or trial. Only ChatGPT is available on iOS and Android. Only OpenAI Codex is available on Linux, CLI and VS Code Extension and offers an API.

Best overall

ChatGPT

  • Students
  • Writers
  • Software Developers
  • Researchers

Choose ChatGPT if

  • You want a tool built for everyday questions, drafting and editing text, summarizing documents, coding help, data analysis and image generation in one assistant.
  • One assistant covers text, voice, images, file analysis, search and coding.
  • Free tier lets users try the service without a card.

Choose OpenAI Codex if

  • You want a tool built for delegating coding tasks to an agent.
  • Included with ChatGPT plans, with a free tier and an $8 Go tier.
  • Open-source CLI under the Apache-2.0 license.
Best for beginners
ChatGPT
Best for business
ChatGPT

Features

18 features compared.

  • Chat with web search
    ChatGPT
    Available
    OpenAI Codex
    Not available
  • Voice mode
    ChatGPT
    Available
    OpenAI Codex
    Not available
  • Image generation
    ChatGPT
    Available
    OpenAI Codex
    Not available
  • File and image analysis
    ChatGPT
    Available
    OpenAI Codex
    Not available
  • Projects
    ChatGPT
    Available
    OpenAI Codex
    Not available
  • ChatGPT agent
    ChatGPT
    Available
    OpenAI Codex
    Not available
  • Codex
    ChatGPT
    Available
    OpenAI Codex
    Not available
  • Connectors and apps
    ChatGPT
    Available
    OpenAI Codex
    Not available
  • Codex CLI
    ChatGPT
    Not available
    OpenAI Codex
    Available
  • IDE extension
    ChatGPT
    Not available
    OpenAI Codex
    Available
  • Desktop app
    ChatGPT
    Not available
    OpenAI Codex
    Available
  • Cloud tasks
    ChatGPT
    Not available
    OpenAI Codex
    Available
  • Code review
    ChatGPT
    Not available
    OpenAI Codex
    Available
  • Non-interactive mode
    ChatGPT
    Not available
    OpenAI Codex
    Available
  • MCP, skills and plugins
    ChatGPT
    Not available
    OpenAI Codex
    Available
  • Subagents and web search
    ChatGPT
    Not available
    OpenAI Codex
    Available
  • Session resume and images
    ChatGPT
    Not available
    OpenAI Codex
    Available
  • Mobile remote control
    ChatGPT
    Not available
    OpenAI Codex
    Available

Pricing

Plans as listed by each vendor. Check their sites for current prices.

  • Pricing model
    ChatGPT
    Freemium
    OpenAI Codex
    Freemium
  • Free plan
    ChatGPT
    Yes
    OpenAI Codex
    Yes
  • Starting price
    ChatGPT
    $0
    OpenAI Codex
    $0
  • Plans
    ChatGPT
    8 plans
    OpenAI Codex
    7 plans

ChatGPT plans

  • Free

    $0

    Limited access to OpenAI's models for everyday use

    • Limited messages
    • Limited file uploads
    • Limited image generation
    • May show ads in some regions

  • Go

    $8/month

    Low-cost plan with more usage than Free

    • More messages than Free
    • More uploads and image generation
    • May show ads

  • Plus

    Most popular

    $20/month

    For individuals who want more capable models and higher limits

    • Access to more advanced models
    • Projects
    • Expanded Codex
    • Higher limits for research and voice

  • Pro 100

    $100/month

    High-volume use for research and coding

    • About 5x Plus usage
    • Everything in Plus

  • Pro 200

    $200/month

    Higher usage than Pro 100

    • About 20x Plus usage
    • Everything in Plus

  • Pro 500

    $500/month

    Highest usage tier

    • Highest usage limits
    • Ultrafast model variants
    • Everything in Plus

  • Business

    $25/user/mo

    For small teams, with a two-seat minimum

    • Shared workspace
    • Admin controls
    • Business data not used for training by default

  • Enterprise

    Custom/user/mo

    For large organizations, priced by contract

    • Single sign-on
    • Admin and security controls
    • Dedicated support

OpenAI Codex plans

  • Free

    $0

    Quick coding tasks

    • GPT-6 Luna in the desktop app
    • Subject to rollout

  • Go

    $8/month

    Lightweight coding tasks

    • GPT-6 Luna in the desktop app

  • Plus

    Most popular

    $20/month

    Focused coding sessions

    • Web
    • CLI
    • IDE and iOS access
    • Automatic code review and Slack
    • GPT-6.1 Sol and GPT-6 Luna
    • Can add credits

  • Pro

    $100/month

    Plans at $100, $200 or $500 per month

    • Everything in Plus
    • No five-hour limit currently
    • Ultrafast mode on the $500 plan

  • Business

    $25/user/mo

    2 or more users; $20 per user per month when billed annually

    • Desktop and mobile apps
    • Larger cloud VMs
    • Add-on credits
    • SAML SSO and MFA
    • No training on business data by default

  • Enterprise & Edu

    Custom/user/mo

    Contact sales

    • Priority request processing
    • SCIM
    • EKM and RBAC
    • User analytics
    • Compliance API audit logs
    • Retention and residency controls

  • API Key

    Pay-as-you-go/usage

    Billed at OpenAI API pricing

    • Codex in the CLI
    • SDK and IDE extension
    • No cloud features
    • Models depend on the API key

Our ratings

Scored out of 10 by the Finder Atlas editorial team. Last reviewed October 2026.

ChatGPT
8.9overall
OpenAI Codex
8.5overall

ChatGPT leads in 1 category and OpenAI Codex in 0.

  • General Reasoning & Logic

    ChatGPT
    9.0
    OpenAI Codex
    Not rated

  • Conversational Fluency

    ChatGPT
    9.2
    OpenAI Codex
    Not rated

  • Coding & Data Analysis

    ChatGPT
    8.8
    OpenAI Codex
    Not rated

  • Multimodal Processing

    ChatGPT
    9.0
    OpenAI Codex
    Not rated

  • Ecosystem & Integrations

    ChatGPT leads by 0.2
    ChatGPT
    8.7
    OpenAI Codex
    8.5

  • Code Generation

    ChatGPT
    Not rated
    OpenAI Codex
    9.0

  • Agentic Autonomy

    ChatGPT
    Not rated
    OpenAI Codex
    8.8

  • Ease of Use

    ChatGPT
    Not rated
    OpenAI Codex
    8.3

  • Value for Money

    ChatGPT
    Not rated
    OpenAI Codex
    8.0

Scores weigh documented features, plan value, platform coverage, integrations and user feedback. A missing score means we have not rated that area yet.

Pros and cons

ChatGPT

Pros

  • One assistant covers text, voice, images, file analysis, search and coding
  • Free tier lets users try the service without a card
  • Apps for web, iOS, Android, macOS and Windows with synced history
  • Large ecosystem of connectors, projects and agent features
  • Plans range from $8 to $500 per month, so users can match spend to usage

Cons

  • Free and Go usage limits are low and may include ads
  • Pricing and model lineup change often, which makes limits hard to compare over time
  • Answers can be wrong and need checking, especially for facts and citations
  • The top Pro tiers cost $100 to $500 per month

OpenAI Codex

Pros

  • Included with ChatGPT plans, with a free tier and an $8 Go tier
  • Open-source CLI under the Apache-2.0 license
  • Available in the terminal, VS Code-based editors, the ChatGPT desktop app and the cloud
  • Supports MCP, skills, plugins and subagents
  • API-key option lets teams pay at API rates instead of a subscription

Cons

  • Plus has message limits per five hours that vary widely by model
  • Cloud features are not available on the API Key plan
  • Higher usage needs Pro, which starts at $100 per month
  • Free and Go plans offer only GPT-6 Luna in the desktop app

Platforms

  • Web
    ChatGPT
    Supported
    OpenAI Codex
    Supported
  • Windows
    ChatGPT
    Supported
    OpenAI Codex
    Supported
  • macOS
    ChatGPT
    Supported
    OpenAI Codex
    Supported
  • iOS
    ChatGPT
    Supported
    OpenAI Codex
    Not supported
  • Android
    ChatGPT
    Supported
    OpenAI Codex
    Not supported
  • API
    ChatGPT
    Not supported
    OpenAI Codex
    Supported
  • Browser Extension
    ChatGPT
    Not supported
    OpenAI Codex
    Not supported
  • Linux
    ChatGPT
    Not supported
    OpenAI Codex
    Supported
  • CLI
    ChatGPT
    Not supported
    OpenAI Codex
    Supported
  • VS Code Extension
    ChatGPT
    Not supported
    OpenAI Codex
    Supported
  • JetBrains Plugin
    ChatGPT
    Not supported
    OpenAI Codex
    Supported

Integrations

ChatGPT

2 integrations
  • Gmail
  • MCP connectors

OpenAI Codex

8 integrations
  • GitHub
  • Slack
  • Visual Studio Code
  • Cursor
  • Windsurf
  • Xcode
  • JetBrains IDEs
  • MCP

Company

  • Company
    ChatGPT
    OpenAI
    OpenAI Codex
    Not listed
  • Founded
    ChatGPT
    2015
    OpenAI Codex
    Not listed
  • Headquarters
    ChatGPT
    San Francisco, CA
    OpenAI Codex
    Not listed
  • Monthly users
    ChatGPT
    Not listed
    OpenAI Codex
    4M+ weekly users
  • Listing
    ChatGPT
    Claimed
    OpenAI Codex
    Not claimed

Frequently asked questions

Is ChatGPT better than OpenAI Codex?

It depends on your workflow. ChatGPT is built for everyday questions, drafting and editing text, summarizing documents, coding help, data analysis and image generation in one assistant. OpenAI Codex is built for delegating coding tasks to an agent.

What are the key feature differences between ChatGPT and OpenAI Codex?

ChatGPT: OpenAI's AI assistant for writing, research, coding, image generation and voice chat. OpenAI Codex: OpenAI's coding agent that writes, reviews and runs code from terminal, IDE, desktop or cloud. ChatGPT is rated 4.0/5 from 1 user review.

Does ChatGPT or OpenAI Codex have a free plan?

Yes, both do. ChatGPT is freemium and OpenAI Codex is freemium, and each has a free plan or trial.

Which is cheaper, ChatGPT or OpenAI Codex?

Both can be used for free. Paid plans differ in limits and features, so compare the tiers in the pricing table above.