OpenAI Codex Alternatives

OpenAI Codex is described as 'One agent for everywhere you code. Powered by OpenAI’s frontier coding models and included in ChatGPT Plus, Pro, Business, Enterprise, and Edu' and is a ai coding assistant in the development category. There are more than 50 alternatives to OpenAI Codex for a variety of platforms, including Mac, Windows, Linux, Web-based and Visual Studio Code apps. The best OpenAI Codex alternative is Google Antigravity, which is free. Other great apps like OpenAI Codex are opencode, Gemini CLI, Void and Claude Code.

filter to find the best alternatives

OpenAI Codex alternatives are mainly AI Coding Assistants, but if you're looking for Code Editors or AI Chatbots you can filter on that. Other popular filters include Open Source. You can also filter by region, for example EU-based alternatives if you prefer software developed in the European Union. These are just examples - use the filter bar below to find more specific alternatives to OpenAI Codex.
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OpenAI Codex alternatives page was last updated

Alternatives list

  1. Plandex icon
     6 likes

    Plandex uses long-running agents to complete tasks that span multiple files and require many steps. It breaks up large tasks into smaller subtasks, then implements each one, continuing until it finishes the job.

    Cost / License

    • Free
    • Open Source (MIT)

    Application type

    Platforms

    • Mac
    • Linux
    • Windows
    • BSD
    • FreeBSD
    • Self-Hosted
    • Docker
     
  2. Cody icon
     5 likes

    Comprehensive AI coding assistant for writing, fixing, and maintaining code by leveraging the entire codebase and code graph. Integrates with various IDEs, providing features like AI chat, autocomplete, and inline edit, and promotes team productivity.

    Cost / License

    • Freemium
    • Proprietary

    Platforms

    • Online
    • Visual Studio Code
    • Software as a Service (SaaS)
     
  3. CodiumAI icon
     5 likes

    CodiumAI’s first tool is an IDE extension that interacts with the developer to generate meaningful tests and code explanations for busy devs.

    Cost / License

    Platforms

    • Mac
    • Windows
    • Linux
    • Visual Studio Code
     
  4. Osaurus icon
     2 likes

    AI edge infrastructure for macOS. Run local or cloud models, share tools across apps via MCP, and power AI workflows with a native, always-on runtime.

    49 Osaurus alternatives

    Cost / License

    • Free
    • Open Source (MIT)

    Platforms

    • Mac
     
  5. Nut Chat icon
     3 likes

    Open source tool centered on AI-driven full stack app development, Nut generates bug analysis via Replay.io recordings and runtime behavior capturing, offering AI developers explanations for effective resolutions. Early adopters enjoy free access for feedback contributions.

    75 Nut Chat alternatives

    Cost / License

    • Free
    • Open Source (MIT)

    Application type

    Platforms

    • Online
    • Self-Hosted
     
  6. opcode icon
     4 likes

    A powerful GUI app and Toolkit for Claude Code - Create custom agents, manage interactive Claude Code sessions, run secure background agents, and more.

    71 opcode alternatives

    Cost / License

    Application type

    Platforms

    • Mac
    • Windows
    • Linux
     
  7. Sourcegraph icon
     15 likes

    Maximize coding efficiency with Sourcegraph’s AI-powered platform. Search and navigate codebases, automate low-level tasks, and improve code quality with custom agents. Sourcegraph ensures seamless integration, security, and deployment flexibility across environments.

    73 Sourcegraph alternatives

    Cost / License

    • Freemium
    • Proprietary

    Application type

    Platforms

    • Online
    • Google Chrome
    • Safari
    • Visual Studio Code
    • Software as a Service (SaaS)
    • Mozilla Firefox
     
  8. Augment Code icon
     3 likes

    Enhances developer collaboration by providing codebase-aware chat, intuitive code suggestions, and advanced AI-driven explanations; accelerates coding tasks, assists in understanding unseen code structures, improving communication vastly within teams.

    77 Augment Code alternatives

    Cost / License

    • Paid
    • Proprietary

    Application type

    Platforms

    • Online
    • Software as a Service (SaaS)
     
  9. OpenPrompt icon
     5 likes

    Copy Entire Folder to ChatGPT. Hit on Star to BookMark this Page ! Newer Release will be even Better.

    Cost / License

    • Free
    • Open Source (MIT)

    Platforms

    • Mac
    • Windows
    • Linux
     
  10. Streamlines AI application development by combining plugin and dataset integration, a unified API, visual orchestration, analytics, annotation tools, prompt engineering support, backend-as-a-service capabilities, and compatibility with multiple modern LLMs.

    Cost / License

    • Freemium
    • Open Source

    Application type

    Platforms

    • Online
    • Self-Hosted
    • Cloudron
     
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