OpenAI said it would start showing ads in ChatGPT to some US users, ramping up efforts to generate revenue from the AI chatbot to fund the high costs of developing the technology. The ads will be tested with users on the company’s free tier and the lower-priced Go plan that it is now expanding globally, OpenAI said on Friday. They will show up in the coming weeks and will be separate from the answers generated by ChatGPT. Users on the more expensive Plus, Pro, Business and Enterprise tiers will