OpenAI Codex

OpenAI Codex is a coding agent experience inside ChatGPT for software engineering work. It is designed to handle routine pull requests, complex refactors, migrations, code review, test generation, and multi-step engineering tasks using OpenAI's coding models and agentic workflows. The product is useful for developers, SaaS founders, and engineering teams that want an AI agent connected to their code work rather than a general chat assistant. Codex can operate across ChatGPT, editor workflows, terminal workflows, and developer documentation, making it relevant for both individual builders and teams. OpenAI's Codex page positions it as a command center for agentic coding with built-in worktrees, cloud environments, parallel agents, skills, scheduled background work, and team standards. That makes it a major keyword target alongside Claude Code, Cursor, Devin, GitHub Copilot, Cline, and Amp. For FutureStack, OpenAI Codex belongs in Coding because it is one of the most important AI software engineering products for developers and founders. It is best for building features, fixing bugs, writing tests, reviewing code, planning migrations, and scaling agentic development workflows.