OpenAI Codex
✓Cloud coding agent with 1M+ developers, Desktop App, and parallel sandboxed environments
AI Coding CLIFreemium
OpenAI Codex is a cloud-based software engineering agent platform used by over 1M developers. Launched in May 2025 with a Desktop App added in February 2026, Codex spins up parallel sandboxed environments, reads your codebase, writes code, runs tests, and submits PRs autonomously. Powered by dedicated models including GPT-5.2-Codex and GPT-5.3-Codex optimized for code generation, it supports multi-file editing, automated testing, PR generation, and parallel task execution. The platform includes a macOS Desktop App with Xcode integration for Apple developers.
- ●1M+ developers using Codex for software engineering
- ●Parallel sandboxed environments: reads codebase, writes code, runs tests, submits PRs
- ●Desktop App for macOS with Xcode integration (February 2026)
