It's more useful to have access your full code base compared to having access to only your input and the output they generate.

Marketing push was there too, everyone was saying Grok had jumped Claude and Codex, yet I never got that when using all 3.

But imagine if they handed out free access to Kimi or GLM-5. Actually, I still wouldn't use it, because I avoid APIs that say they hold on to data.

And presumably they got data from it...