Checkout MessengerX.io, they have a suit of APIs listed on their site and rapidapi that one can leverage to build AI products without breaking a sweat.
With ChatGPT, I think a lot of products are starting out as ChatGPT wrapper, but i guess other than VC, who really cares. Then you just move fast, try to get as many people using it as possible as a B2C prodduct (youtube, tiktok, twitter marketing) and then get users feedback as early as possible and carefully track how users use the products, either quantitatively or qualitatively, and then just iterate. Even if your products start out as a wrapper, a couple iterations later, there are going to be so many features that is specific for your users. So speed + iterations for the new gen of AI product
Labescape