Codex CLI use cases2026
5 tasks Codex CLI solves in our index — across code and adjacent categories. Each links to a per-task breakdown with alternatives and pricing for that workflow.
Codex CLI for code review
Catch bugs, style drift and security issues before they merge.
Codex CLI for bug fixing
Reproduce, root-cause and fix bugs end-to-end — from issue to merged PR.
Codex CLI for refactoring
Multi-file structural changes — rename, extract, inline, reorganize — across hundreds of files with consistent reasoning.
Codex CLI for writing tests
Generate unit, integration and edge-case tests from existing code.
Codex CLI for pair programming
Inline code completions, side-panel chat, and "explain this code" pair-programming assistance.