OpenAI Codex Plugin Integrates GPT-5.6 Sol into Claude Code

OpenAI released the Codex plugin for Claude Code, enabling the GPT-5.6 Sol model to run within Anthropic's Claude Code, bridging two competing AI ecosystems into a unified coding workflow. Initially shared by @danielmac8 on 07-11 with a GitHub repository, the setup methods were further popularized by @drcintas, @SabooShubham, and @socialwithaayan, who provided step-by-step instructions that can be completed in minutes.

Setup Methods

The community outlined two main approaches:

Official Plugin Route (shared by @drcintas, @socialwithaayan): Execute /plugin marketplace add openai/codex-plugin-cc in Claude Code, then install codex@openai-codex. Once enabled, commands like /codex:review and /codex:adversarial-review become available.
Manual Proxy Route (amplified by @dkundel, @rickasaurus): Configure a proxy via CLIProxyAPI to point Claude Code to gpt-5.6-sol and set up a claudex shell alias, taking about 5 minutes.

Use Cases and Significance

According to @SabooShubham, the integration allows users to invoke Codex directly within Claude Code for code reviews or delegate specific tasks. @socialwithaayan similarly highlighted its value for code review workflows. @danielmac8 noted that this is a practical implementation for coding workflows, focusing on embedding external models into coding agents rather than evaluating the models themselves. Overall, it represents a practical exploration of cross-vendor tool collaboration.

2026-07-11 ~ 2026-07-13 · 10 related posts

Primary sources

Integrating GPT-5.6 Sol into Claude Code — daniel_mac8 · 2026-07-11 21:28 (UTC+08:00)
GPT-5.6 Sol Can Now Be Integrated into Claude Code — dr_cintas · 2026-07-13 02:47 (UTC+08:00)
Codex Now Integrates With Claude Code — Saboo_Shubham_ · 2026-07-12 10:27 (UTC+08:00)

Using GPT-5.6 Sol Inside Claude Code — daniel_mac8 · 2026-07-11
[source] Integrating GPT-5.6 Sol into Claude Code — daniel_mac8 · 2026-07-11
Guide to Connecting Claude Code with GPT-5.6-Sol — dkundel · 2026-07-12
[source] Codex Now Integrates With Claude Code — Saboo_Shubham_ · 2026-07-12
Running GPT-5.6 Sol in Claude Code — dr_cintas · 2026-07-13
How to Connect GPT-5.6 to Claude Code — rickasaurus · 2026-07-13
[source] GPT-5.6 Sol Can Now Be Integrated into Claude Code — dr_cintas · 2026-07-13
GPT Can Now Review Code Inside Claude Code — socialwithaayan · 2026-07-13

2 near-duplicate retellings: Saboo_Shubham_ · dr_cintas