There are diffusion-based models and transformer-based models (and many other "architectures"), so your comment does not make sense.

Are there any diffusion-based or otherwise non-transformer-based models in mainstream use?

	▲	moralestapia 2 hours ago \| parent [-]
		If by mainstream you mean "ChatGPT" or "Claude", then no. But also, no one really knows as they're closed.