Open-weight song models
1 in the catalogue today, and the list grows as the market does. Every one with what it costs, who sells it and where it stands.
Models that write and perform a whole song — words, voice and backing — from a description. They are the part of the music market people actually buy, and they are sold almost entirely by the month rather than by the API call, which is why a catalogue built on rate cards can miss them completely. What you may do with the result usually depends on which plan you are on.
Weights published under a licence that lets you run them where you like and sell what you build — Apache 2.0, MIT and their kin impose little beyond keeping the notice. This is the list to start from if you need the model on your own hardware, in your own region, or simply want no third party between you and it. The trade is that hosting is now your problem, and the prices shown beside each one are what somebody else charges to do it for you.