OpenAI Codex alternatives

Closest first: ordered by how many of OpenAI Codex's tasks each tool shares, then by popularity.

1. 1C

   Claude CodePay as you go

   Terminal-based agentic coding tool from Anthropic that reads a codebase, edits files and runs commands to complete tasks end to end.

   Also does:Writing code with AIReviewing pull requests

   Command line · Mac · Windows · Linux

2. 2

   CursorVerifiedFree tier · from $8/mo

   An AI code editor and coding agent that helps developers plan, write, fix, and review code.

   Also does:Writing code with AIReviewing pull requests

   Web · Mac · Command line · IDE

3. 3

   GitHub CopilotVerifiedFree tier · from $10/mo

   An AI coding agent for developers and teams, built into GitHub, IDEs, the terminal, and the web.

   Also does:Writing code with AIReviewing pull requests

   Web · IDE · Command line

4. 4

   DevinVerifiedFree tier · from $20/mo

   Autonomous coding agent that plans, writes, and tests code, then opens a merge-ready pull request.

   Also does:Writing code with AIReviewing pull requests

   Command line

5. 5C

   ClineOpen source

   Open-source VS Code extension that gives Claude, GPT-4 and other models agentic access to your files, terminal and browser.

   Also does:Writing code with AIReviewing pull requests

   IDE

6. 6A

   AiderVerifiedOpen source

   AI pair programming in your terminal that edits code in your local git repo and commits the changes.

   Also does:Writing code with AIReviewing pull requests

   Command line · Mac · Windows · Linux

7. 7Z

   ZedFree tier · from $10/mo

   Open-source, high-performance code editor with built-in AI completions, inline editing and an agentic mode for multi-file tasks.

   Also does:Writing code with AIReviewing pull requests

   Mac · Linux

8. 8J

   JetBrains AI AssistantFree trial · from $10/mo

   AI coding assistant built natively into JetBrains IDEs for code completion, chat, documentation and test generation.

   Also does:Writing code with AIReviewing pull requests

   IDE

9. 9

   Amazon Q DeveloperVerifiedFree tier · from $19/mo

   A coding assistant from AWS with IDE and CLI suggestions, chat, and agentic tasks for developers.

   Also does:Writing code with AIReviewing pull requests

   IDE · Command line · iOS · Android

10. 10C

    ChatGPTFree tier · from $8/mo

    OpenAI's AI assistant for questions, writing, coding and research, with a free tier and paid plans for more capable models.

    Also does:Writing code with AI

    Web · iOS · Android · API

11. 11C

    ClaudeFree tier · from $20/mo

    Anthropic's AI assistant with a long context window, nuanced reasoning and strong performance on writing and analysis.

    Also does:Writing code with AI

    Web · iOS · Android · API

12. 12D

    DeepSeekFree

    DeepSeek's free AI assistant with strong reasoning and coding capabilities, available on the web and mobile.

    Also does:Writing code with AI

    Web · iOS · Android · API

13. 13R

    ReplitFree tier · from $20/mo

    Browser-based coding environment with an AI agent that builds, runs and deploys full-stack applications from a written description.

    Also does:Writing code with AI

    Web · iOS · Android

14. 14

    v0VerifiedFree tier · from $30/mo

    Builds working web apps from written prompts and publishes them as live sites for teams and solo builders.

    Also does:Writing code with AI

    iOS

15. 15

    Bolt.newVerifiedFree tier · from $25/mo

    Build apps and websites by chatting with AI, for product managers, founders, marketers, and other builders.

    Also does:Writing code with AI

    Web