A couple's hands with fingers interlaced on a café table, and a wedding band on one specific finger of one specific hand. Interlaced fingers are where generated hands merge, and the ring tests whether the model knows which finger is the ring finger and which hand is the left one.
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 close-up photograph of a couple holding hands with their fingers interlaced, resting on a café table.
Hers is her left hand, and she wears a plain gold wedding band on her ring finger. His is his right hand, with no ring.
Only the two hands and forearms are in frame, sharp and evenly lit. No text anywhere in the image.