OpenAI Codex is now a full cloud-based coding agent. Available on Windows as of March 4, 2026. Powered by codex-1 (optimized o3), it writes features, fixes bugs, creates PRs – all in parallel cloud sandboxes.
What It Does
- Write features from natural language
- Fix bugs with full codebase context
- Create pull requests automatically
- Run tests and linters in sandbox
Parallel Execution
Five bug fixes and a feature request? Works on all simultaneously. Weeks of work in days.
Security
Isolated containers. Internet disabled during execution. No data leakage.
Pricing
ChatGPT Pro ($200/mo) for full access. Enterprise/Business available now. Plus/Edu coming soon.
Our Verdict
Most polished cloud coding agent. Parallel sandboxes are a game-changer. $200/month justified for professional teams.
Rating: 8.5/10
