Raspberry Pi Foundation released next generation of Compute Module with label 3+ (CM3+).
Compute Module 3+ is available in a few variants which differ by amount of eMMC memory.
CM3+/Lite $25
CM3+/8GB $30
CM3+/16GB $35
CM3+/32GB $40
The procesor of board is BCM2837B0. The amount of RAM is 1 GB.
The big improvements is better heat dissipation from processor.
You can also buy whole kit called Compute Module Development Kit.
CM3+ is now available on distributors and supports until January of 2026.
Link: https://www.raspberrypi.org/blog/compute-module-3-on-sale-now-from-25/
Farnell distributor
https://cz.farnell.com/search?ost=compute+module&searchref=searchlookahead&produktova-rada=raspberry-pi-compute-module-3pos