Comparison
GitHub Copilot vs OpenAI Codex
GitHub Copilot: AI assistant that suggests code in real time inside your editor OpenAI Codex: OpenAI's coding agent, included with ChatGPT.
| GitHub Copilot | OpenAI Codex | |
|---|---|---|
| Rating | 4.7 | 4.5 |
| Price | Freemium Free plan (2,000 completions/month). Pro from $10/month. Pro+ $39/month. Max $100/month. Business $19/user/month. Enterprise $39/user/month. | Freemium Limited use on the free ChatGPT plan. Go $8/month, Plus $20/month, Pro $100-200/month, Business $25/user/month. Since April 2026 it bills against token credits. |
| Free plan | ||
| API available | ||
| Open source | ||
| In Spanish | ||
| No watermark | — | — |
| Platforms | Web · Windows · Mac · Linux · Extension | Web · Windows · Mac · Linux · iOS |
GitHub Copilot
- Native integration in VS Code, Visual Studio, JetBrains and other popular editors
- Advanced AI models: access to Claude Opus, GPT-5, and specialised or custom models
- Autonomous agents that carry out complex tasks without constant supervision
- The interface and prompts work best in English; quality drops in other languages
- Limited official completions API; there is no public endpoint to integrate into your own apps
OpenAI Codex
- Included in the ChatGPT subscription you already pay for
- Its CLI is open source and accepts your own API key
- Works in the cloud on several tasks at once
- Since April 2026 it bills against token credits: hard to predict
- Real heavy usage runs to $100-200 a month per developer