“if your business success is predicated on making it slightly cheaper to access what open AI offers or slightly easier you're in trouble they can and do change pricing and their UI and access restrictions and interfaces at any point”

Stop being a wrapper — be a focused solution

If your value prop is "slightly cheaper / slightly easier access to GPT," the platform will close that gap and your business evaporates. The defensible play is the opposite: pick a specific user (estate planner, bridesmaid speech writer, podcast publisher) with a specific workflow, and use the model as one ingredient inside a tailored end-to-end product. Wrappers compete with the platform; focused solutions compete with the customer's current way of doing the job.