I used Claude 3.5 Sonnet to write a watercolor style thumbnail prompt to be used with FLUX.1 Pro to update and replace my blog post open graph (social sharing) images and the results are incredible seeing as how it took like 3 seconds and $0.02 per image
A list of some other styles Claude recommended:
Could absolutely be used for YouTube thumbnails (for us busy people who don't have a lot of time to be creating thumbnails)