A wonderful example: ChatGPT Enterprise now supports reading and understanding visuals (images, graphs, diagrams, etc.) embedded in PDF files. Users can upload a PDF, and ChatGPT can interpret the text and any visual elements within that file.
Cool! But ... "and it is not currently available for GPT-based projects."
These things are so incredibly confusing in daily use for users: In my personal account ChatGPT cannot analyze images in PDFs, in my business account it works, but not when I upload the PDF as knowledge to my GPT ...