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Best OpenAI Codex Alternatives in 2026

12 platforms from AI coding assistants ranked against OpenAI Codex on the same published basis.

  1. 1
    Devin Free plan apiLinuxMacWebWin $20/mo8.8
    OpenAI Codex vs Devin
  2. 2
    Kilo Code Free plan AndroidapiextensioniOSLinux $15/mo8.8
    OpenAI Codex vs Kilo Code
  3. 3
    CodeGPT Free plan apiextensionLinuxMacself-hosted $10/mo8.7
    OpenAI Codex vs CodeGPT
  4. 4
    Snowflake CoCo Free trial apiLinuxMacWebWin 7.7
    OpenAI Codex vs Snowflake CoCo
  5. 5
    GitHub Copilot Free plan AndroidextensioniOSLinuxMac $10/mo7.6
    OpenAI Codex vs GitHub Copilot
  6. 6
    Gemini Code Assist Free plan WebWinMacLinux $22.80/mo7.4
    OpenAI Codex vs Gemini Code Assist
  7. 7
    Claude Code Free plan WebWinMacLinuxiOS $17/mo7.3
    OpenAI Codex vs Claude Code
  8. 8
    Coder Free plan apiLinuxMacself-hostedWeb Free7.3
    OpenAI Codex vs Coder
  9. 9
    JetBrains Junie Free plan WebWinMacLinux $8.33/mo7.2
    OpenAI Codex vs JetBrains Junie
  10. 10
    Gemini CLI Free plan WinMacLinux Free7.2
    OpenAI Codex vs Gemini CLI
  11. 11
    OpenHands WebWinMacLinux 7.1
    OpenAI Codex vs OpenHands
  12. 12
    Cline WinMac 7.1
    OpenAI Codex vs Cline
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