Let me elaborate, how likely is that there’s an animal on earth that’s smarter than us? By smarter, I understand intelligence is a nuanced topic unique to different animals, so for the sake of argument, let’s talk about, mathematics, critical thinking about where and how to apply those mathematical concepts, and creativity in any form.
I’d say above 50% of potentially multiple large dolphin species, but likely just one that’s really smarter than us and that’s the Orca.
They just don’t have fingers, let alone opposable thumbs, and live in the ocean.