I think that's got to be highly variable. I've worked for a couple of startups that went under and the IP had basically zero value. Who is going to pay for a failed implementation of a failed idea?
They have no moat. So, how do you get to $4B?
I think the models are wrong way too often for relatively simple queries, so unless they give a secret prompt like "be wrong a lot in the free version" to users, it's basically worthless.
This is a huge assumption.
I am not sure how differentiated OpenAI's IP is, so I don't have a strong opinion, but it seems to me that OpenAI is worth a lot more as a package than it would be as a collection of pieces.
Well maybe the employees will be worth something.