Quake Champions will be ending closed beta on August 22nd and moving into Steam Early Access. Players who already have or claim their closed beta accounts will be able to play the free version, others will have to buy the 29.99$ (25% off of later retail price) Champions pack to play. The pack includes all champions, an exclusive skin for Ranger, all future Champions and 3 Reliquaries (loot boxes). Other content for the game announced:

Quake Champions is about to exit its Closed Beta phase and officially enter into Early Access on Steam and the Bethesda.net launcher. Starting on August 22, the game will receive a whole host of content, including new maps, features and a special new Champion: the mighty DOOM Slayer from the DOOM series.

Official source