Which Raspberry Pi do I have?

Run
grep Revision /proc/cpuinfo

and look it up on https://elinux.org/RPi_HardwareHistory.

Revision Release Date Model PCB Revision Memory
Beta Q1 2012 B (Beta) ? 256 MB
0002 Q1 2012 B 1.0 256 MB
0003 Q3 2012 B (ECN0001) 1.0 256 MB
0004 Q3 2012 B 2.0 256 MB
0005 Q4 2012 B 2.0 256 MB
0006 Q4 2012 B 2.0 256 MB
0007 Q1 2013 A 2.0 256 MB
0008 Q1 2013 A 2.0 256 MB
0009 Q1 2013 A 2.0 256 MB
000d Q4 2012 B 2.0 512 MB
000e Q4 2012 B 2.0 512 MB
000f Q4 2012 B 2.0 512 MB
0010 Q3 2014 B+ 1.0 512 MB
0011 Q2 2014 Compute Module 1 1.0 512 MB
0012 Q4 2014 A+ 1.1 256 MB
0013 Q1 2015 B+ 1.2 512 MB
0014 Q2 2014 Compute Module 1 1.0 512 MB
0015 ? A+ 1.1 256 MB / 512 MB
a01040 Unknown 2 Model B 1.0 1 GB
a01041 Q1 2015 2 Model B 1.1 1 GB
a21041 Q1 2015 2 Model B 1.1 1 GB
a22042 Q3 2016 2 Model B (with BCM2837) 1.2 1 GB
900021 Q3 2016 A+ 1.1 512 MB
900032 Q2 2016? B+ 1.2 512 MB
900092 Q4 2015 Zero 1.2 512 MB
900093 Q2 2016 Zero 1.3 512 MB
920093 Q4 2016? Zero 1.3 512 MB
9000c1 Q1 2017 Zero W 1.1 512 MB
a02082 Q1 2016 3 Model B 1.2 1 GB
a020a0 Q1 2017 Compute Module 3 (and CM3 Lite) 1.0 1 GB
a22082 Q1 2016 3 Model B 1.2 1 GB
a32082 Q4 2016 3 Model B 1.2 1 GB
a020d3 Q1 2018 3 Model B+ 1.3 1 GB
9020e0 Q4 2018 3 Model A+ 1.0 512 MB
a02100 Q1 2019 Compute Module 3+ 1.0 1 GB
a03111 Q2 2019 4 Model B 1.1 1 GB
b03111 Q2 2019 4 Model B 1.1 2 GB
c03111 Q2 2019 4 Model B 1.1 4 GB

Article Link: https://blag.nullteilerfrei.de/2020/09/19/which-raspberry-pi-do-i-have/