Not sure I follow. OpenAI are not claiming they are going to release their model at all. The team behind Stable Diffusion have currently kept every promise they've made.
(And if you're insinuating something, just come out and say it so people can engage appropriately)
Still not sure I understand. It's already available in two forms: a Discord bot for a wide group of beta users, and the "researchers-only" source release.