A agentindex
Comparison

GitHub Copilot vs OpenAI Codex

A like-for-like, spec-level comparison. Both entries are verified against their docs and repo.

GitHub Copilot

GitHub's AI pair programmer across editor and CLI.

  • + Deep GitHub integration
  • + Broad model choice in 2026
  • − Agent mode lags specialists
  • − Subscription required

OpenAI Codex

OpenAI's open-source agentic coding CLI.

  • + Open-source CLI
  • + Sandboxed command execution
  • − OpenAI models only
  • − Newer, less battle-tested than incumbents
Spec GitHub Copilot OpenAI Codex
Category coding-agent coding-agent
License Proprietary Apache-2.0
Open source No Yes
Self-hostable No No
MCP support Yes Yes
Pricing paid usage
Starting price $10/mo Pay per token (OpenAI API)
Models gpt, claude, gemini gpt
Languages multi multi
GitHub stars — 93.6k
Last activity — 2026-06-25