Using ChatGPT as planner and Codex as executor
A firsthand experiment shows ChatGPT being used in a Codex-like role by connecting it to through MCP. With that setup, ChatGPT could read and write files on a local computer and complete a local CAD task.
The final CAD result was only average, but the work process was notable: ChatGPT asked for step by step, used multiple subagents, and kept working for almost an hour. The practical idea is to split roles between tools.
ChatGPT may be better suited for high-level planning, reasoning, and review, while local such as Codex are better for changing files, running commands, and checking results. A small was built to make this split more consistent and add basic safety limits.
Key points
- ChatGPT was connected to local and used in a Codex-like workflow.
- MCP made it possible for ChatGPT to read and write files on the local computer.
- The CAD output was not great, but the longer planning and execution process looked promising.
- The proposed split is ChatGPT for planning and review, Codex for execution and .
- Local needs safety limits before it is practical for everyday work.