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.

Product's datasheet.

Link: https://www.raspberrypi.org/blog/compute-module-3-on-sale-now-from-25/
Farnell distributor