Claude Code vs Codex for Real Coding Workflows

Calvin French-Owen published a detailed comparison of Claude Code and Codex based on weeks of greenfield development, and the split is practical rather than tribal. Claude handles planning, orchestration, and tool integration better - MCP servers, gh CLI, Chrome debugging - while Codex produces measurably fewer bugs in final implementation, catching off-by-one errors and race conditions that Claude misses. The workflow he landed on uses both: Claude for architecture and context management, Codex for writing production code, then Cursor Bugbot and Codex Code Review for verification. He built a library of custom skills like /implement-all and /pr-pass that evolved organically over time. His core insight is blunt: context window limitations dictate everything, compaction degrades quality, and externalizing plans to the filesystem is the only reliable workaround. The recommendations to both Anthropic and OpenAI read like a user who hit real walls at scale