Selfhosted

You have to run an LLM of your own and link it, if you want quality even close to approaching Google, but the Home Assistant with the Nabu Casa "Home Assistant Voice Preview Edition" speakers are working well enough for me. I don't use it for much beyond controlling my home automation components, though. But it's still very early tech anf it doesn't understand all that much unless you add a lot of your own configurations. I eventually plan to add an LLM, but even just running on the home assistant yellow hardware with a raspberry pi compute module 5 works ok for the basics though there is a slight delay.

I haven't tried, but Nabu Casa also offers a subscription service for the voice processing if you want something more robust and can't host your own LLM, but thst means sending your data out, even if they have good privacy policies, which I'm not interested in, because while I somewhat trust Nabu Casa's current business model and policies, being hosted in the US means it's susceptible to the current regime's police-state policies. I'm waiting for hardware costs to recover from the AI bubble to self host an LLM, personally.

Home Assistant can absolutely do that. If you are ok with simple intent based phrasing it'll do it out of the box. If you want complex understanding and reasoning you'll have to run a local LLM, like Llama, on top of it

Home Assistant can do that, the quality will really depend on what hardware you have to run the LLM. If you only have a CPU you'll be waiting 20 seconds for a response, which could also be pretty poor if you have to run a small quantized model

Maybe things have improved but the last time I tried the Home Assistant er- assistant, it was garbage at anything other than the most basic commands given perfectly.