[brookst]

But I would expect they would at least use post-training to discourage identifying as the wrong company.

[dannyw]

A lot of API customers don't want their chatbot or agent to identify as Claude or GPT, they want it to identify as <customisable marketingname>.

[scotty79]

That's probably the true reason.

[XenophileJKO]

That only makes sense if you don't sell access to the model for 3rd party product development. One of those products is chat personas/agents. The company integrating the model will want it's own identity.