That honor officially belongs to the Carolina Reaper, which earned its title as the hottest pepper in the world — beating out a pepper called the Trinidad Scorpion — in 2013. \" The hottest known pepper to date on the Scoville scale is the Carolina Reaper. Julie eshaies/ShutterstockIn 2017, a new pepper, known only as Pepper X came on the scene, rating about 3.2 million Scoville units. It took 10 years to develop; as of 2020, Guinness World Records (which had earlier crowned the Carolina Reaper as the hottest pepper) had not yet confirmed that Pepper X was now the hottest pepper. Now That's Crazy A 34-year-old man was rushed to the ER with unusual \"thunderclap headaches\" after participating in a hot pepper contest where he ate one Carolina Reaper pepper.