OpenAI Codex CLI
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Lightweight coding agent in the terminal — reads, changes, and runs code locally
Key Features
Multi-Agent Single Agent Human-in-the-Loop Streaming Async Support Short-Term Memory MCP Protocol Code Execution File System Access Sandboxing CLI Self-Hosted
Community Feedback
Strengths
- Free with API key
- Clean UI
- Rust performance
- Strong sandbox security
- Affordable with gpt-4o
Weaknesses
- macOS-only desktop app
- Doesn't show reasoning by default
- Declining output quality reports
- Subagents consume more tokens
OpenAI Codex CLI Details
| Organization | OpenAI |
| Organization Type | Company |
| Funding | Series b+ |
| Category | Ready-to-Use |
| Subcategory | Code generation |
| Deployment | Self-Hosted |
| Primary Language | Rust |
| Runtime | macOS, Linux, Windows (experimental) |
| License | Apache-2.0 |
| Commercial Use | Permissive |
| Install Command | brew install openai-codex |
| GitHub Stars | 67,340 |
| GitHub Forks | 9,013 |
| Release Cadence | Weekly |
| Maturity | Stable |
| Pricing Model | Free |
| Free Tier | Free with OpenAI API key |
| Self-Hosted Free | Yes |
| Cost Model | free + API costs |
| Community Size | Very large |
| Community Activity | Very active |
| Sentiment | Positive |
| GPU Required | No |
| Research Date | 2026-03-24 |
| LLM Providers | OpenAI (GPT-4o, o3, o4-mini) |
| API Keys Required | OpenAI API key |
Use Cases
- Code generation and editing
- Sandboxed code execution
- Quick code tasks from the terminal
- Bug fixing and refactoring
When to Use
Best for: Developers wanting free, sandboxed AI coding assistance
Avoid when: Need rich plugin/hook ecosystem or Windows support
Original data from HuggingFace, OpenCompass and various public git repos.
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Release v20260328a