Leaked documents received and verified by Videocardz confirm that the Alder Lake Core i5-12400F and Core i3-12100F will be the first 12th-gen Intel CPUs to ship without any Gracemont efficiency cores.
https://www.notebookcheck.net/Leaked-documents-confirm-that-Alder-Lake-Core-i5-12400F-and-Core-i3-12100F-won-t-have-Gracemont-efficiency-cores.585159.0.html