Feature Request: Support for Third Party Whisper API

[tianshuo]

From China, groq/openai and multiple services are blocked by default. This can be circumvented by hosting a "reverse proxy", or using non-blocked servcies and calling that address instead. So to use our own hosted reverse proxies, there could be two solutions:

1. in groq/openai, add the settings to use a custom "baseurl", which would solve this
2. provide a new third party provider, which means we could use that service, but you would also need a calling type (because openai/elevenlabs etc have different types)

[thisisharsh7]

Thanks for raising this request @tianshuo this makes a lot of sense, especially for regions where providers are blocked.
tagging @braden-w here for visibility since this touches the provider/backend integration

[klauern]

This is similarly useful for organizations that set up their own LLM gateway for cost management and routing.

[palpen]

++

I'd like to use this app for work but my organization only provides a proxy URL rather than API keys.