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Suno v6 vs v5.5
Suno retired v4 through v5.5 when v6 launched, so this is not really a choice between two live models. It is a question about what you lose and what you gain — and there is one situation where the older one is still the answer.
| What | Suno v6 | Suno v5.5 |
|---|---|---|
| Track length | You choose, 10–360 seconds | Also supported, 10–360 seconds |
| Vocals | Suno’s stated focus for this generation | Good, and what most libraries here were built on |
| Model variants | Three: flagship, Wild, Mini | One |
| Your own lyrics | Up to 5,000 characters | Up to 5,000 characters |
| Reusable voice persona | Yes | Yes |
| Status at Suno | Current generation | Discontinued on 9 September 2026 |
| What it costs here | 10 credits a generation | No longer offered for new songs |
So which one should you use?
For a new song: v6. Not because of a feature v5.5 lacks, but because v5.5 is discontinued and the three v6 variants give you somewhere to go when the first take is wrong — Mini to try five ideas cheaply, Wild when the safe arrangement is the problem.
For a song you already made: leave it alone. Extending it has to stay on the model that made it — the API requires the model to match the source audio — so a v5.5 song is extended on v5.5, even though v5.5 is no longer offered for new songs. A cover is a new recording, so that one can be made on v6.
And the honest caveat: the differences between these two are not the kind you hear in a blind test on every song. The three-way choice within v6 will change your results more than moving off v5.5 did.
Try v6 now