Technically, no. OpenGL is a driver specification, not a standalone software program. It comes pre-installed as part of your Graphics Processing Unit (GPU) drivers.
Yes, if you are a developer. OpenGL itself is a driver-level API, but to write code, you need: opengl 46 download new
If you see websites offering a download for opengl32.dll or "OpenGL 4.6 zip file," be cautious. Technically, no
If you need OpenGL 4.6 for coding (C/C++): Yes — as long as your GPU driver supports it
Yes — as long as your GPU driver supports it.