Isn't this what openrouter is for?

What's openrouter?

edited to remove statement saying API only, as per comments.

	▲	metrix 2 days ago \| parent \| next [-]
		They have a chat feature allowing you to talk with multiple models
	▲	boomskats 2 days ago \| parent \| prev \| next [-]
		Not sure if you noticed, but the first CTA on the link you posted is a prompt to "Start a message", which then opens a multi-model capable chat interface.
	▲	kosolam 2 days ago \| parent \| prev [-]
		Openrouter has a chat built in as well. Also, since librechat was mentioned, the self hosted option I currently prefer is openwebui - connected to openrouter and gemini here.