He definitely considers himself a co-founder at least. Part of the confusion might be that Tesla also produced a Founder Series of 20 - 30 cars for both the Ro

He definitely considers himself a co-founder at least. Part of the confusion might be that Tesla also produced a Founder Series of 20 - 30 cars for both the Roadster and Model S. Musk also has a large Founder badge on the back of his Model S (which has been shown in a few videos), I'm not sure if that is on all of the Founder Series cars or not.