Thanks I have generated both

beaver riding a scooter: https://gist.github.com/SerJaimeLannister/f6de26bd0d0817e056...

pelican riding a bicycle: https://gist.github.com/SerJaimeLannister/f6de26bd0d0817e056...

Personal opinion but the beaver one looks especially bad as compared to pelicans. Can we be for sure that this model of grok-4.3 hasn't been trained on pelican. Simonw in blog-post says that he will try with other creatures so I hope he does that but it does feel to me as the model/xAI is trying to cheat, Hope Simonw tests it out more.

Edit: Also added turtle riding a scooter, something which literally has images online or heck even teenage mutant ninja turtles and I thought that it would be able to pass this but it wasn't even able to generate this: https://gist.github.com/SerJaimeLannister/f6de26bd0d0817e056...

This literally looks more avocado than turtle. Perhaps this could be a bug from arena.ai or something else too, not sure but at this point waiting for simon's analysis.