The OpenAI Codex plugin connects GPT-5.6 directly to your Claude Code session. One install, two models, no switching tabs. This guide covers the setup step by step and four practical ways to use both models together from day one.
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What's inside
01How to Install the Plugin
02Use 1: Code Review With a Second Opinion
03Use 2: Generate Tests, Then Verify Them
04Use 3: Plain-English Explanations for Non-Technical Stakeholders
05Use 4: Rapid Prototyping With Dual-Model Iteration
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