Phoronix published a review on the OpenGL 4.6 Released With Vulkan/SPIR-V Ingestion, Parallel Shader Compiles & Finally AF A quote from the article:

As we have been anticipating for weeks/months, a new formal update to OpenGL has been in the works and it's officially out today. Meet OpenGL 4.6! This is a pretty significant update and internally they had the debate whether to call it OpenGL 5.0, but here we are with OpenGL 4.6 that features Vulkan/SPIR-V extensions and more. The good news is the open-source Mesa drivers aren't too far out from OpenGL 4.6 support, at least RadeonSI and Intel.

 OpenGL 4.6 Released With Vulkan/SPIR-V Ingestion, Parallel Shader Compiles & Finally AF @ Phoronix