@mybarkingdogs @sandwich @bob @adhdeanasl I use ChatGPT for almost *all* of my alt texts. It's as simple as uploading the image and asking "describe this image for the visually impaired". If there's something specific you want mentioned to add context to the image say "describe this image for the visually impaired, make sure to describe it as...." Or "...make sure to add the context of..." And a short explanation. It will understand.
For an example, I've been uploading screenshots of Minecraft on a very specific popular server. I tell it "describe this image for the visually impaired, make sure to describe it as a screenshot from the 2b2t Minecraft server" and it knew exactly what the server was about and how to describe it 100% correctly.