Claude Code, Codex or GitHub Copilot: which one?
Three major coding agents compared on vendor, category, agent features and announced use cases, using the figures each vendor publishes.
| Compared tools | Vendor | Category | Description | Tags |
|---|---|---|---|---|
| Claude Code | Anthropic | Coding agents | Terminal-first (CLI) coding agent. Named a Leader by Gartner (May 2026); used by 66% of developers who use agents, per Stack Overflow 2026. | CLI, MCP |
| Codex | OpenAI | Coding agents | OpenAI's coding agent, used by more than 4 million people every week according to OpenAI (April 2026). Named a Leader by Gartner. | CLI, Cloud |
| GitHub Copilot | GitHub | Coding agents | Assistant and agent built into GitHub: 4.7M paid subscribers (+75% year over year) per Microsoft (January 2026 earnings). Used by 59% of agent users (Stack Overflow 2026). | IDE, Enterprise |
Sources
- Gartner: 2026 Magic Quadrant (Virtualization Review)
- Stack Overflow: 2026 survey, AI data
- Anthropic: Claude pricing
- Claude Code: model configuration (context)
- Claude Code: v2.1.310 release notes
- OpenAI: 4 million weekly users (April 2026)
- OpenAI: Leader in the 2026 Gartner Magic Quadrant
- OpenAI: Codex pricing
- Codex CLI on GitHub (Apache-2.0 licence)
- OpenAI: models and Codex on Google Cloud
- OpenAI: Codex CLI 0.164.0 release notes
- Microsoft: fiscal 2026 Q2 earnings
- GitHub: Copilot plans
- Microsoft: VS Code 1.143 release notes
- GitHub: Copilot in Microsoft Teams (Oct 23, 2026)
- GitHub: assisted permissions generally available (Oct 26, 2026)
- GitHub: GPT-6.1 Terra in Copilot (Oct 26, 2026)