As said above, it purely depends on the incarnation.
Comic-wise, base Thor clears Z/GT due to speedblitz and vastly superior stamina, though loses to any relevant Super character. Rune King Thor beats anyone who isn't Zen-Oh.
If it's MCU Thor, his base self is City level and his Awakened self is Island level, though he likely isn't fighting against Part 1 high tiers unless speed's equalised.