Codex vs GitHub Copilot: Side-by-Side Comparison 2026

Codex vs GitHub Copilot comparison 2026. Side-by-side features, pricing & capabilities.

Codex is an AI agent and a CLI-based coding agent from OpenAI — asynchronous autonomous coding agent. GitHub Copilot is an editor extension from GitHub (Microsoft) — your ai pair programmer.

Codex🏆 Approved

OpenAI's autonomous coding agent. Available via web, desktop app (macOS), CLI (macOS/Linux/Windows), and VS Code extension.

  • ✓ Code completions
  • ✓ AI chat
  • ✓ Agentic mode
  • ✓ Multi-file editing
  • ✓ Terminal commands

Free / $8/mo · 6 plans

GitHub Copilot

GitHub's AI coding assistant that suggests code completions, whole functions, and chat-based help directly in your editor.

  • ✓ Code completions
  • ✓ Chat
  • ✓ CLI integration
  • ✓ Pull request summaries
  • ✓ Code review

Free / $10/mo · 5 plans

Feature Codex GitHub Copilot
Category Agent / CLIExtension
Starting Price Free Free
Model Family GPT / CodexMulti-model
Voice Input — ✓
Open Source Yes (CLI)No

Pricing verified Feb 25, 2026. Codex pricing | GitHub Copilot pricing

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Key Differences

  • Category: Codex is an AI agent and a CLI-based coding agent; GitHub Copilot is an editor extension.
  • Starting price: Codex starts at $8/mo; GitHub Copilot starts at $10/mo.
  • Model family: Codex uses GPT / Codex; GitHub Copilot uses Multi-model.
  • Open source: Codex: Yes (CLI). GitHub Copilot: No.
  • Bring your own key: Codex supports BYOK; GitHub Copilot does not.
  • Platforms: Codex runs on Linux, Web, Windows (experimental), macOS; GitHub Copilot runs on Desktop, Web.
  • Provider: Codex is built by OpenAI; GitHub Copilot is built by GitHub (Microsoft).
  • Capabilities: GitHub Copilot has voice input.

Which Should You Choose?

Choose Codex if you want asynchronous coding tasks you can fire off and review when ready. Choose GitHub Copilot if you want deep integration with GitHub workflows. Read our full reviews to see which fits your workflow.

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