He is best known for his 2020 single "Go Stupid" (with Polo G and NLE Choppa featuring Mike Will Made It), which received triple platinum certification by the Recording Industry Association of America (RIAA).

Two years prior, he signed with fellow North Carolina–based rapper DaBaby's Billion Dollar Baby Entertainment, an imprint of Interscope Records to release his debut album, Big 4x (2019) and its follow-up, Rich Youngin (2020).

Despite having the city as part of his stage name, Caldwell claims no personal connection to Las Vegas; the "4" was adapted from his hometown area code.

[5] In late September 2018, Caldwell released the track "Animal", which featured fellow North Carolina rapper DaBaby.

The album contained guest features from DaBaby, Offset, NLE Choppa, Young Nudy, & Lil Durk.

[15] Later on, in November 2020, Caldwell released his third studio album, Welcome to 4 Vegas, which included features from DaBaby, Murda Beatz, Toosii, and Ola Runt and did not chart.