GrapheneOS 2019.09.23.19 release: grapheneos.org/releases#2019..
This will be the initial Stable channel release targeting Android 10.
Now that the initial port is done, work can begin on restoring past privacy/security features and implementing new ones. See github.com/GrapheneOS/os_.
Conversation
Does Graphene OS get Google security patches at the same time as other OEMs?
I could not find anything regarding this on the website.
1
GrapheneOS is a partner in the security program so it receives security patches in advance. It doesn't help with much, since it only really takes a day to integrate the patches, build, test and ship a release. Major version upgrades are also a different story as you can see here.
2
The project was fully capable of shipping the September Android Open Source Project patches earlier, but it's currently in an early stage of development and a decision was made to focus on porting to Android 10 to offer the full set of privacy/security improvements in it sooner.