Recently, Microsoft confirmed players who want to play Halo Infinite online won’t need a subscription to Xbox Live Gold, the paid service which allows players to play on Xbox servers. Not only that, but Halo Infinite multiplayer will be available at 120 frames per second for the people who want it.
— Halo (@Halo) July 31, 2020
Interestingly, this functionality will only be available for Xbox Series X owners, which doesn’t explain how things will work for people who buy the game on Xbox One. This plays into the rumor substantiated by Venture Beat writer Jeff Grubb that Xbox will be moving to a free model for online soon. Microsoft recently pulled the ability for players to order yearly subscriptions of Xbox Live Gold, leading to the rumor, and obviously makes players believe a large change is coming to the service with the launch of the new console.
Presumably, some of those change will be revealed when the Xbox Series X launches later this year.