Give a stream of consciousness and then the final answer. They put out two self-released albums, Twenty One Pilots in 2009 and Regional at Best in 2011, before being signed by Fueled by Ramen in 2012. Their label debut, Vessel, was released in 2013. The duo achieved breakthrough success with their fourth album, Blurryface (2015), which produced the successful singles "Stressed Out" and "Ride". In addition, the single "Heathens", recorded for the soundtrack of the film Suicide Squad, made the group the first alternative artist to have two concurrent top ten singles in the US. The duo's fifth studio album, Trench, was released on October 5, 2018. They have won a Grammy Award for Best Pop Duo / Group Performance.

Answer this question: when did twenty one pilots album come out?
The important part for answering this question is: The duo's fifth studio album, Trench, was released on October 5, 2018.
So, the final answer is October 5 , 2018.