Wonderful, timely article. It sounds like a hybrid approach might produce good results: Using ChatGPT-5 for planning/analysis and using Claude for execution.
Another option would be to add something to your AGENTS.md or whatever giving examples of the kind of code organization you want. You could ask Claude to explain its approach in terms explicitly that GPT-5 can understand. GPT-5 seems much more sensitive in its responsiveness to instructions. My sense is that in the long run this will be really nice, but that the current prompts in these mainstream LLM coding tools are designed for models with a different style of responsiveness to instructions.
