OpenAI is bringing a new AI model, GPT-4o, to ChatGPT, the company said Monday. The idea is to bring “GPT-4”-class chat to the OpenAI app, and for free to all OpenAI users. OpenAI will accompany the launch of the GPT-4o model with a new Mac app that will showcase the capabilities of the new model, which can now “see” the world around it. A Windows app will debut later on. The GPT-4o model can now “see,” as well, via vision capabilities that include desktop screenshots as well as the ability to upload video and screenshots from a mobile app — again, just an iPhone app for now. Perhaps the most …