Tesla is still valued high, despite FSD did not came, despite being promised. So OpenAI would get away with delivering ChatGPT5, if it is better than the competition.
Sure, but if you want to compete with Tesla, you need many billions in funding and 10+ years to catch up. If you want to compete with OpenAI, you need maybe half a billion (easy to raise in the current climate; many have done so) and mb a few months to catch up.