When Apple Inc. Chief Executive Officer Tim Cook and his top deputies this week unveiled a landmark arrangement with OpenAI to integrate ChatGPT into the iPhone, iPad and Mac, they were mum on the financial terms.Left unanswered on Monday: which company is paying the other as part of a tight collaboration that has potentially lasting monetary benefits for both. But, according to people briefed on the matter, the partnership isn’t expected to generate meaningful revenue for either party — at leas...