Closed song models
2 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.
Models whose weights are not published and which are bought through somebody's API. You get the maker's infrastructure, their scale and their uptime, and no way to run the thing yourself or to keep it if it is withdrawn. Most of the strongest models are here, so this is less a choice than a fact about the market; the choice is which seller you buy the same model from, and the catalogue holds their prices side by side.