Re:Mistral 7B, the most powerful language model for its size...
by monocasa on Thursday September 28, 2023 @07:55PM
(#37697577)
https://www.microsoft.com/en-us/sharedsource/
Microsoft has other mechanisms for sharing source and is remarkably open. The symbol servers are relatively public as well. They are at a scale where they rely more on legal strength to keep their IP rather than it not being externally accessible in the first place, at least for Windows.
Some large OEMs get access to Windows Server source code as well.