Jumbo-kun, the Official Character of KUGAYAMA JUMBO DENKI, a Vintage Clothing Store in Tokyo, Undergoes Major Update. New Version Released on April 1st for 3rd Anniversary, Combining Local Focus with Cutting-Edge LLM.
Vintage clothing store Jumbo Denki upgrades its AI character "Jumbo-kun" to Claude 3.5 Sonnet, enhan… · 2026-03-30