No account needed. Please don't include account details, API keys or private chats in the prompt, source code or notes.
Classic: .svg file, UTF-8, ≤ 512 KiB. It is shown as an image, which cannot load anything from other hosts, so keep everything (styles, fonts, images) inside the file.
The tool or channel you ran the model in. The same model can draw differently in a chat app and in a coding agent.