Activision has set testing windows for Modern Warfare 4 ahead of its late October release. Pre-order holders on major platforms gain entry during the final week of August, while a public beta opens to all players shortly after, with Switch 2 joining the broader test phase. The extended five-day pre-order window allows early adopters to begin simultaneously with the official Call of Duty Next broadcast rather than watching streamers play first.

A significant departure from recent precedent is Game Pass's exclusion from early beta access. Players holding Microsoft's subscription service no longer receive the priority entry they enjoyed during the Black Ops 6 and 7 betas, a consequence of Microsoft's broader decision to remove new Call of Duty titles from its subscription offering.