Borland C++ is a 32-bit compiler, I believe the latest version is 5.5 and it came out in about 2000.

There is a newer version from Embarcadero, 7.20 from 2016[1].

The compiler in C++Builder is more modern and it will target 64-bit for Windows at least.[0]

[0]: https://docwiki.embarcadero.com/RADStudio/Alexandria/en/C%2B...

[1]: https://www.embarcadero.com/free-tools/ccompiler

"C++Builder includes compilers for Win32, Win64 and iOS"

https://www.embarcadero.com/free-tools/ccompiler

Which is why there is a new clang based compiler now.

They say right on the release announcement that they have a clang-based compiler and that the system supports 64-bit binaries.

This is C++ Builder, not Borland C++.