How does TikTok's AI song feature work, and when should you use a real generator?

You type "cuddling with pets" into a box, wait a few seconds, and get back a verse about soft fur and Sunday mornings over a pop beat. It fits under a video. It also sounds like it could fit under anyone's video, because it more or less could. That is the trade TikTok's AI song feature offers, and it is a perfectly good trade for some posts and a bad one for others.

This page is about choosing: what the feature is, what it can and cannot give you, and when the better move is to write a proper lyric with a generator, have it sung in a separate tool, and bring the finished track back to TikTok yourself. If your real goal is the step after that, getting your own released song into TikTok's sound library so other creators pick it up, that is a distribution question with its own article: how to get your song used as a TikTok sound. Read that one if you already have the track. Read this one if you are still deciding how to make it.

What TikTok actually tested

In January 2024 TikTok confirmed to TechCrunch that it was testing a feature called AI Song. The details the company gave, and that early users showed in their own videos, were these:

• You enter a prompt. The app offered starters such as "Going to concerts", "A new beginning" and "Cuddling with pets", or you could write your own.
• The lyrics came from Bloom, a large language model.
• The music was not generated for your song. According to TechCrunch's report, the lyrics were paired with music from a pre-saved catalogue created within TikTok.
• You could switch the vibe between pop, EDM and hip-hop.
• It was experimental and available to a select number of users, and TikTok said it might change the feature's name later.

The early user's walkthrough video that TechCrunch described carried two cautions in its caption: the lyrics might contain errors, and the same lyrics might be generated for more than one user.

Now the part that matters for anyone reading this later. At the time of writing we could not find a current page in TikTok's own help centre that describes an AI Song feature, its availability or its rules. That does not prove it is gone; TikTok tests features with small groups and renames them. It does mean nobody outside TikTok can tell you whether your account has it today. Open the app's create screen and look. If you see a song or lyrics option with an AI label, you have some version of it. If you do not, nothing on this page depends on it: the alternative route below works on every account.

What a feature like this is good at

Speed and zero friction. You never leave the app, you pay nothing, and the result is already a sound sitting on your draft. For a certain kind of post that is exactly right:

• a joke that lives for one afternoon, where the song is the punchline and nobody needs to hear it twice;
• a trend where the point is that everyone made one with the same tool;
• a quick test of whether an idea gets any reaction before you put real time into it.

In those cases the generic quality is not a defect. A song about your dog that sounds like a song about everyone's dog is fine if the video is about the dog.

Where it runs out

The limits follow straight from how the feature was described when it surfaced.

You do not steer the lyric. A prompt box gives the model a topic. It does not let you say whose voice the song is in, what the hook should do, or how the song should be built. The words come back in whatever shape the model prefers.

The music is picked, not made. A pre-made catalogue paired by genre means your song shares its backing with everyone else's song in that genre. Three genres is three moods, roughly.

It stays inside TikTok. The feature was built to put a sound under a TikTok video. It was not presented as a way to get a file you can release, put on Spotify, or use in a YouTube Short next week.

Repeats are possible. If the same lyric can come back for several users, the line you thought was yours may already be under someone else's video.

None of this is a scandal. It is a sketchpad, and the coverage said as much: TechCrunch wrote that the feature was designed for fun, not for chasing the next viral song.

The other route: lyric first, then a tool that sings

The alternative splits the job into steps that each do one thing well.

1. Write the lyric from a brief, not from a topic. This is where the song gets a point of view, a hook and a structure.
2. Have it sung in a music generator. Usually that is Suno, which takes a lyric with section tags and a style description and returns full songs with vocals.
3. Cut the moment you need (TikTok's editor or CapCut, whichever you already use) and post it.
4. Optionally, release it through a distributor so it lands in TikTok's sound library under your name. That is the part covered in the TikTok sound article.

Step 1 is the only part sunomarket does, so here is exactly what it is and is not. sunomarket is an independent site, not affiliated with TikTok, with Suno, or with any other company named here. The lyric generator at /generators takes a short form brief and returns a title and a full lyric with [Verse] and [Chorus] style section tags, ready to paste into Suno's Lyrics field. It does not sing. There is no audio, ever: that happens in Suno or whichever tool you pick, which is a separate company we do not resell or speak for.

What a brief for a TikTok song looks like

The form has closed choices, so a brief is quick to fill. Here is one for a song meant to sit under a 15-second clip of a cat ignoring dinner:

POV        first
language   en
structure  loop
hook       chant
vocal      female
emotion    playful
age        18-24, 25-34
theme      My cat watches me cook every night from the top of the fridge,
           then sniffs the plate once and walks off. I keep trying harder
           recipes. She keeps refusing. The joke is that she is the critic
           and I am the nervous chef.

Each line is doing work for the video. loop asks for a song built around repetition, which suits a clip that will play on repeat. chant asks for a hook short enough to shout along with. first keeps the narrator as the person holding the phone. playful keeps the song light, so the cat stays the punchline and the song never turns into a sad ballad about being rejected.

Compare that with what a prompt box gets: "cat doesn't like my cooking". Same topic, none of the decisions.

And this is the kind of verse and chorus a brief like that is aiming at. We wrote it as an illustration of the target shape; it is not a pasted generator output:

[Verse]
Burnt the toast at seven, set the kitchen alarm off
Cat up on the fridge like she owns the place and then some
Plated it like a chef, she sniffs it once and looks away
Two stars from the fridge top, that's my review today

[Chorus]
Not hungry, not hungry, she says it with her tail
Not hungry, not hungry, my menu's up for sale
Not hungry, not hungry, she'd rather lick the plate
Of anything that I didn't make

Three of the four chorus lines open on the same two words, which is what chant buys you on TikTok: a viewer can say "not hungry" along with the clip on the second loop without knowing the rest of the song. The verse sets up the scene the camera already shows. The whole thing is built so the 15 seconds you cut can be the chorus alone and still make sense.

Side by side

Notice the overlap row. A generator does not make a lyric magically unique, and we do not claim it does: two people with near-identical briefs can get similar songs. What changes is how much of the song came from your decisions. The more specific the theme, the less likely anyone else lands near it.

What it costs on our side

One lyric from the SM1 model is 20 credits, which is $0.20 at 100 credits to the dollar. SM2 and SM3 are the more polished models at 80 credits ($0.80): they run an extra pass where a detector flags weak lines and a repair step rewrites them. For a chant-hook TikTok song SM1 is usually enough; the polish pays off more on a song with longer verses that people will actually listen to.

The plans, in dollars:

• $5 a month gives 500 credits, which is 25 SM1 lyrics or 6 SM2 lyrics. Unspent plan credits are cleared at renewal.
• $19 once (lifetime) gives 1,500 credits one time, 75 SM1 lyrics, and they never expire. It is not unlimited generation.
• A $10 pack of 1,000 credits can be added from your profile once you have a plan or lifetime, and it never expires either.

New accounts start with 0 credits, and there is no free trial of the lyric generator. The style catalogue, full recipes for the 10 most popular styles, the prompt guides and the first three preset categories of the prompt generator are free without a card, which is enough to see whether the approach suits you before paying. Full details are on /pricing.

On the Suno side, read Suno's own help pages before you post, not after. At the time of writing, Suno's help centre says songs made on the free plan are for personal, non-commercial use and cannot be monetized, while songs made on a paid Pro or Premier plan come with commercial use rights, including use in content you post to YouTube and TikTok, and that subscribing later does not retroactively cover songs made on the free plan. If the account you post from earns money, that line matters. Plans and terms change, so check the current page.

Labels: what TikTok's rules say about AI audio

TikTok's community guidelines have a section on edited media and AI-generated content (AIGC). As written at the time of writing, they define AIGC as any image, video or audio made or changed by AI, so an AI-sung song is AIGC by that definition, whichever tool made it.

What the guidelines require is narrower than that definition. Disclosure is required for AI or heavily edited content that shows realistic-looking people or scenes, and the listed cases include AI-generated audio that mimics the voice of a real person. Disclosure is listed as not needed for small edits, artistic styles such as anime, and generic text-to-speech that is not the recognisable voice of a known person. You can disclose with TikTok's own AIGC label or with your own clear caption, sticker or watermark. Unlabelled content that needed a label may be removed, restricted or labelled by TikTok, depending on the harm it could cause.

How that maps to the two routes:

• An original song with a synthetic voice that imitates nobody is not one of the listed required cases. Labelling it anyway costs nothing and saves you a comment section full of "is this AI?".
• A song whose vocal is built to sound like a real singer falls squarely into the listed cases, and beyond TikTok's rules it raises rights questions of its own. Leave real artists' voices out of it.
• If your video also contains a realistic AI-generated person, that triggers the label on its own, song or no song.

This is a summary of TikTok's published guidelines, not legal advice, and the rules get revised; read the current version before you rely on it. For how rights in AI-generated music work more broadly, see who owns AI-generated music and our disclaimer.

Business accounts are a separate case

If you post from a TikTok business account, music works differently. TikTok's ads help pages describe a Commercial Music Library for business use, and say business accounts should use it rather than the general sound catalogue for commercial content. A song you made yourself and hold the rights to is a different situation from picking a track from the general catalogue, but if you are a brand, read TikTok's business music rules and your music tool's commercial terms together. If what you actually need is background music you are licensed to use, rather than a song of your own, the royalty-free music for Shorts, Reels and TikTok article walks through the licence tiers.

Picking the route for this post

The decision is mostly about how long the song needs to live.

Use TikTok's in-app tool (if your account has it) when the song is a throwaway joke, the post is for one day, and you would not care if three other people had a near-identical verse.

Use a generator and a music tool when any of these is true:

• the song is the point of the video, not a backing track;
• you want a specific hook people can repeat, and you want to choose what kind;
• you want the same song in a Short, a Reel and a TikTok, or on streaming later;
• it is for a person (a birthday, an anniversary, a friend's name in the chorus) and generic would feel lazy;
• the lyric is in a language other than English. The form takes ru, es, de, fr, it, pt, ja and ko as well as en.

Look at CapCut first if you already edit there and want to see what its own music features offer before adding another tool; that is covered in CapCut AI music.

Your next fifteen minutes

Pick one video you are planning this week. Write down, in one sentence, what the viewer should say along with the clip on the second loop. That sentence is your hook. Then open /generators, set hook to chant or title-line, put the scene in theme with one concrete detail only you would know, and run it. Paste the lyric into Suno, generate a couple of takes, and cut the fifteen seconds where the hook lands. If the clip works without the rest of the song, it is ready to post.