For several months, the Xbox Game pass for PC was in its beta phase, phase during which Microsoft offered its service for $4.99 per month. However, from September 17, you'll need to pay $9.99 to access the vast catalog offered by the service.
Even with this significant price increase, the Xbox Game Pass offers a good batch of games for all tastes and even recent titles from third-party publishers such as Cruisader's King 3, among many others. Note that the Game Pass will include EA Play as part of the subscription later this year.
You can also subscribe to the Xbox Game Pass Ultimate to benefit from the service on your PC and your Xbox One for $14.99.