I’ve heard from people inside Google that they’re prohibited from using anything but their own models. AlbertaTech on YT, ex-Google working on YT said in a video that right before she quit someone had threatened to quit if they couldn’t get access to Claude Code
Kind of, but you can also assert it yourself; the big tech companies have billions of lines of code not publicly available, they can train their in-house code assistants on those instead of or in addition to what's available out in the open.