Three Ways to Call Codex from Claude Code — A Practical Breakdown

Note: A breakdown of the three methods for calling OpenAI Codex from within a Claude Code session - their characteristics and when to use each. Researched on 2026-04-15. Key Discovery: The Plugin Does NOT Call codex --full-auto The most important finding: codex-plugin-cc (used in Methods 2 and 3) internally uses the App Server Protocol (ASP) - not the raw