What Suno actually said about v4
v4 arrived on 19 November 2024, in beta, for Pro and Premier members. Suno's own description of it runs to nine words, and each third of the sentence points at a different problem the previous models had:
"v4 delivers cleaner audio, sharper lyrics, and more dynamic song structures."
Cleaner audio was the answer to v3.5's band-limited, MP3-only output. Sharper lyrics came with a new lyrics model rather than from the music model at all. And more dynamic song structures addressed the flatness that made four-minute v3.5 tracks feel like the same eight bars repeated - the thing that made length feel like padding rather than arrangement.
Worth noting the context, because it explains some of the ambition. v4 shipped roughly five months after the major labels sued Suno, and shortly after the company brought Timbaland on as a strategic advisor. This was a release with something to prove.
Ten weeks that turned a generator into a toolkit
Before autumn 2024, Suno did one thing: you wrote a prompt, it made a song, and if you didn't like the song you wrote another prompt. There was no way to keep anything - not a voice, not a melody, not a version you'd already made. Every generation was an island.
Between 12 September and 19 November 2024 that changed completely, and it changed in five separate drops:
One model release, four feature releases, and two that arrived just before. Our illustration.
Covers and Personas technically predate v4, but Suno's own framing is that v4 supercharged them - a better model made a preserved melody and a saved voice worth having. That's the pattern of the whole window: the model improvement is what made the features usable, and the features are what made the model improvement matter.
What's still here, and what isn't
Five features shipped in that window. Four of them are load-bearing parts of Suno in 2026 and have their own guides on this site. One is gone.
Now one of the four workflows under Remix, and the standard answer to "the song is right but the sound is wrong". Our guide.
The only real answer to keeping a catalogue sounding like one artist, and the feature most people discover far too late. Our guide.
Still the alternative to Classic lyrics. Useful, though writing your own remains the highest-leverage thing you can do - it's the only input rendered literally.
Quietly important - it's the still image inside every MP4 Suno exports, which is why your video download looks the way it does.
The one that didn't make it. Remaster let you re-render an older track at v4 quality, and for a while it was the standard advice for anyone with a v3 or v3.5 catalogue. In September 2025 Suno published a model availability update that deprecated Remaster v4 for all users, in the same notice that removed v2 and v3 for free accounts.
Four of the five are still load-bearing. Our illustration.
What Remaster's deprecation should teach you
Remaster is a small story with a large moral. It was a headline feature of a major release, promoted in the announcement, and it lasted about ten months. Nobody did anything wrong - Suno improved past it, and re-rendering v3-era audio at v4 quality stopped being the interesting problem once v5 existed. But if your plan for an old catalogue was "I'll remaster it later", later never came.
The pattern repeats. Features get deprecated. Models get retired - Suno's Upcoming Changes FAQ says retirement means "you can't generate new songs with it," though "it doesn't affect anything you've already made." And exports can vanish outright: when Udio settled with Universal in October 2025 it disabled downloads of audio, video and stems, and they have not come back. The only version of your work that is genuinely safe is the one on your own disk.
Which makes the practical advice unglamorous but firm. If you have a v4-era catalogue you care about, download it - and do it before the allowance rules land on 3 September 2026, or at least in full awareness of them. One song counts as one download no matter how many formats you take, so there's no reason to be sparing about it. The download guide covers the counting rule properly.
As for what replaced Remaster: nothing did, exactly, and nothing needed to. The modern equivalent is simply to regenerate the idea on a current model. It costs a handful of credits, and v5.5 starting fresh will beat v4 polishing v3.5 every time.
Is v4 worth using now?
v4 sits in an awkward spot. It's a genuine generation ahead of v3.5 - full-quality audio rather than a 12 kHz ceiling - but a generation and a half behind v5.5, and the specific things it was praised for in 2024 have all been superseded.
Fair reasons to pick v4
- Matching an existing project. If a release started on v4, finishing on v4 keeps it consistent.
- A/B curiosity. Running one prompt across v3.5, v4 and v5.5 teaches you more about the tool in ten minutes than any guide.
- You prefer its character. Legitimate - but test whether a prompt descriptor gets you there on v5.5 first.
Reasons that don't hold up
- "It's more reliable." Prompt adherence improved substantially after v4, not before it.
- Cost. Model choice doesn't change what a generation costs you in credits.
- Length. v4 caps at four minutes; v4.5 onward doubled that.
- Anything you plan to release. The audio gap to v5.5 is audible, and older generations are easier for platforms to flag.
And the same caveat as everywhere else on this site: check your own model picker. Availability has changed by plan tier before and Suno doesn't always announce it loudly. Our v3.5 page covers the retirement policy in full, including Suno's exact wording.
Suno v4 FAQ
When was Suno v4 released?
19 November 2024, in beta, for Pro and Premier members. Remaster, Lyrics by ReMi and updated Cover Art shipped the same day.
What did v4 improve over v3.5?
Suno's own line is "cleaner audio, sharper lyrics, and more dynamic song structures." The audio jump is the big one - v3.5 was 24 kHz and MP3-only, with nothing above about 12 kHz. Maximum length stayed at four minutes.
What was Remaster?
A v4 feature that let you re-render an older track at v4 quality - Suno described it as "enhance tracks you made with older models". It was deprecated for all users in September 2025.
What replaced Remaster?
Nothing directly. The current equivalent is to regenerate the idea on v5.5, which costs a few credits and beats any amount of polishing applied to older audio.
Did Personas and Covers come with v4?
Not quite - Covers arrived in early access on 12 September 2024 and Personas on 31 October 2024, both before v4. Suno's framing is that v4 supercharged them, and in practice a better model is what made them worth using.
What is Lyrics by ReMi?
A separate lyrics model introduced with v4, offered alongside the Classic option. Suno's help centre calls it "a newly designed model with some edgier results." It writes words; it has nothing to do with how the music is generated.
Can I still generate with v4?
Check the model picker on your own account. Availability has shifted by plan tier before - v2 and v3 were removed for free users in September 2025 - and Suno hasn't published a current list of which versions remain selectable.
Will my v4 songs be affected if v4 is retired?
No. Suno's wording on retirement is that it means "you can't generate new songs with it" and that "it doesn't affect anything you've already made." Your library stays put - but download the tracks that matter anyway.
v4 or v4.5?
v4.5 (May 2025) on every measure that matters: 8-minute first generations instead of four, and noticeably better prompt adherence. v4.5+ followed in July 2025 with Add Vocals and Add Instrumental.
Why did v4 feel like such a big deal at the time?
Because it wasn't only a model. Five features landed in ten weeks, and together they turned Suno from something that produced disposable songs into something you could build a body of work with. The audio quality was the part people wrote about; the toolkit is the part that stuck.
Sources
We're an independent guide with no affiliation to Suno, Inc. Model availability changes without warning and varies by plan - your own model picker is the only reliable answer to "can I still use it". Feature dates follow Suno's published release notes. We have not repeated unverified claims about which model versions are scheduled for retirement. The diagrams are our own illustrations. Last reviewed August 2026.
The features outlived the model
Personas and Covers are still how you get a coherent body of work out of Suno, two years after the release that made them matter. Remaster isn't - which is the argument for downloading anything you'd miss.