To pin or not to pin this is my question?

Its often quoted as best practice to pin libraries / api versions etc. Is this also considered best practice when using open AI models ?

there’s a note in the documentation for models

With the exception of chatgpt-4o-latest , we offer pinned model versions that developers can continue using for at least three months after an updated model has been introduced.

am i understanding it correctly, it seems the pinned model can also change?