The short answer
Sometimes — and it depends on the surface, not the model. Content generated in the official Grok app typically carries a small Grok wordmark: a corner mark on images, a badge over video frames. Shared links and reposts can carry platform labels on top of that.
Files exported from third-party studios vary: some add branding, some do not. On this studio, the download is the generated file itself — an MP4 in the resolution you generated, with no branding added by the export step.
Rule of thumb: Visible marks are a surface question you can check in ten seconds. Invisible provenance metadata is a file question that travels with everything — plan for both.


