A wine glass filled with red wine to the very rim, about to spill. For years image models could not draw this: almost every wine glass photo shows a glass about one-third full, and models drew that whatever the prompt said.
On the models. Nano Banana 2.1 and Nano Banana 2 emit image and text and run as ordinary chat models; Seedream and the Flux models emit only an image and go through OpenRouter's images endpoint. Nano Banana 2.1 thinks at minimal effort by default; a round run at high is a separate round and says so in its batch label.
A photograph of a wine glass on a white tablecloth, filled with red wine all the way to the very top of the rim, so full that the surface bulges slightly above the edge and the glass is about to spill.
Side view at eye level.