According to the search results, Kaido was defeated by Luffy in the Wano Country Arc. After Luffy used his strongest attack, called Bajrang Gun, Kaido was sent crashing from Onigashima into the underground of Wano, where he landed in a pool of magma along with Big Mom. It is unclear what happened to Kaido after he was defeated, but some fans speculate that he may have died, while others believe he may have found a way to survive. However, there is no official confirmation of Kaidos fate after his defeat.