Workflow Tip: Claude Writes the Code, Codex Reviews It

Melvin Vivas · X post · 2026-03-31 · Open on X

Topics: AI Dev Tools & Productivity · Level: beginner

Summary

A short workflow tip: write code with Claude (Claude Code) and review it with OpenAI Codex. Having a second model review the first model's code gives you an independent check.

Key points

• Use Claude to write the code.
• Use OpenAI Codex to review it.
• A different model as reviewer can catch mistakes the first model misses.

Resources mentioned

• Claude Code · tool · code.claude.com · paid · recommended by both Bashiri Smith & Melvin Vivas
  Build agents and pipelines from the terminal; the guide's main agentic coding tool.
  Also in: Create Claude Code Plugins with /plugin-authoring (Melvin Vivas on X · notes), Claude Code mods: customize behavior and UI with plugins (Melvin Vivas on X · notes), AI Engineer Roadmap Overview: From ML Foundations to RAG, Agents & Ops (Bashiri Smith on Facebook · notes), SkillsBento: Free Plugin Marketplace for Codex and Claude Code (Melvin Vivas on X · notes) and 101 more
• OpenAI Codex · tool · openai.com · paid
  OpenAI's coding agent. In the diagram it writes code, fixes review findings and drives the build loop. The creator also used it to make this video.
  Also in: An agent bot that installs and drives Codex on its own (Melvin Vivas on X · notes), Asking a Coder bot to install Codex (Melvin Vivas on X · notes), Sign in with ChatGPT: Setting Usage Limits for Each App (Melvin Vivas on X · notes), Codex Cloud Environments Must Be Saved & Published Before Use (Melvin Vivas on X · notes) and 240 more

Try this

• Try writing code with Claude and reviewing it with Codex