The GDK for Unreal uses SpatialOS core technology and cloud hosting. This means that when you use the GDK, you need to consider the SpatialOS pricing model.
SpatialOS has a free tier and a paid tier, and you can use the GDK on either of these. For more information, see Pricing.
2020-07-14 Page updated with editorial review: updates relating to the new pricing pages
2019-05-20 Page updated with editorial review
Updated about a year ago