AI Avatar Video Generator

It is a lip-sync pipeline with three stages, and knowing the stages tells you where quality comes from and where the cost comes from.

1. A portrait. On the AI creator surface you cast a creator: a preset, a written description, or a face photo you upload. The portrait renders 9:16 and is saved with a name and a voice. The AI UGC creator page covers casting properly.
2. An audio track. You type a script, or have one drafted from the product name, the description and the angle you pick. The creator's voice reads it. The audio is what you are billed on.
3. The lip sync. The portrait is animated to match that audio, so the mouth, the jaw and the head move with the words.

That is the whole product. It is not a video editor, it does not clone the voice of a named real person, and it does not place your avatar into footage. What it gives you is the piece most short ads are missing: a human face saying a specific sentence to the camera.

Three models, and the only real trade is resolution against credits per second. All three are capped at 15 seconds of speech per generation, with a 3-second minimum.

Pick this way:

• InfiniteTalk at 480p is for auditions. Run the script here first at 1 credit a second, watch it back, and find out whether the wording sounds like a person before you pay four times as much.
• Kling Avatar at 720p is the working default. It is sharp enough for a phone screen, which is where every one of these ads is watched.
• Kling Avatar Pro at 1080p is for the clip you are actually going to spend money distributing, or for anything that gets cropped, zoomed or cut into a longer edit.

Auditioning at 480p and re-running the keeper at 720p costs 45 credits instead of 30, which is about $4.50 on the $49.99 plan. That is cheaper than shipping a 1080p clip whose second sentence does not scan.

Fifteen seconds of speech is a hard ceiling on one generation, and that works out at about 35 words. Write past it and you are writing a second clip whether you meant to or not.

Two things follow from that table.

You are charged on the real audio, not on your estimate. A script you counted as 12 seconds that voices at 14 costs 28 credits on Kling Avatar 720p, not 24. Counting words is the cheapest way to keep the bill predictable.

A 30-second ad is two clips. Generate the first 15 seconds, generate the second 15 seconds, and join them. Write it as two halves with a clean break between them, not as one paragraph cut in the middle, because the seam lands wherever your sentence ends. The hook plus demo mode does a related job: a talking hook of up to 8 seconds joined to a demo clip in one 1080 x 1920 file, for 2 credits.

Four rules, then three scripts you can use as they are.

• Front-load the problem. The first three seconds decide the rest. Never open with the brand name.
• Short sentences sync better. A long unbroken clause makes the mouth movement look mechanical. Full stops give the model somewhere to breathe.
• One claim, not three. Thirty-five words holds one argument. Pick the strongest.
• Say what happens next. A clip with no ask is a clip that gets watched and forgotten.

1. Language learning app, 35 words

• Hook, 0 to 3 seconds: "Three hundred day streak and you still cannot order lunch."
• Body, 3 to 12 seconds: "This drills speaking from day one. Ten-minute calls with an AI tutor that corrects pronunciation and sends the words you missed."
• Call to action, 12 to 15 seconds: "Lesson link is below."

2. Home insurance comparison, 35 words

• Hook: "Your home insurance renewed itself again."
• Body: "This site reads your current policy, matches the cover, and shows what six insurers charge for the same thing. Four minutes, no phone calls."
• Call to action: "Compare yours from the link."

3. Spreadsheet course, 34 words

• Hook: "Half the jobs you want ask for advanced spreadsheets."
• Body: "This is twelve hours of lessons with real data files, pivot tables, lookups and dashboards. You finish with three interview projects."
• Call to action: "Course link is below."

More angles by category sit in the UGC ads index, and SaaS UGC ads and mobile app UGC ads both cover the spokesperson shape in detail.

A talking avatar and a faceless voiceover video solve different problems, and the cost gap between them is wide enough to matter.

Use the avatar when the message is short and personal: a spokesperson video for a landing page, the first three seconds of an ad, an answer to the one objection that kills your checkout. Use the faceless route when the product needs a minute of context, and the whole faceless UGC generator wing is built for that.

The two combine well. A talking hook of 8 seconds costs 16 credits on Kling Avatar 720p. Join it to an animated product clip for 2 more, and you have a face opening an ad that a faceless format finishes. That is the cheapest use of an avatar there is, and the AI UGC ad generator page has the full hook test built around it.

Lip sync quality depends on the portrait more than on the model. A bad portrait at 1080p looks worse than a good portrait at 480p, because the resolution just shows you the problem in more detail.

Portraits that sync cleanly

• The face is front-facing, or close to it, and roughly centered.
• The light is even. No hard shadow cutting across the mouth.
• Nothing covers the lower face: no hand on the chin, no mug, no microphone, no scarf.
• The mouth is closed or slightly open. A wide fixed grin gives the model very little to work with.
• The head is at a normal distance. An extreme close-up or a tiny face in a wide room both sync worse.

Portraits that do not

• A profile or a three-quarter turn past about 30 degrees.
• Heavy motion blur, low resolution, or a heavily filtered face.
• Two people in frame. The model needs one face to animate.

If a generated portrait syncs badly, regenerate the portrait rather than the video. The portrait costs 2 credits on Nano Banana 2 or 1 credit on Z-Image. A 15-second video costs 30. Fixing the cheap end first is always the right order, and the pricing page has the full credit table if you want to plan a batch.

The avatar is not a person. It never used your product, never held it before you uploaded the image, and has no experience to describe. Keep the script on the product and this is simple.

• Pitch, do not testify. "Twelve hours of lessons and three interview projects" is a product fact. "This got me my job" is a claim by somebody who does not exist.
• Claims stay inside what the product does. Features, specifications, price, what is included. No invented outcomes, no star ratings on screen, no numbers you cannot source.
• No borrowed authority. Do not dress the avatar as a doctor, a lawyer or an official, and do not write a line that implies a qualification.
• Check the current disclosure rules for the platform you are buying on before you run it. They change, and they differ by country.

Verified on 17 September 2026:

• The FTC's Disclosures 101 for Social Media Influencers says plainly: "You can't talk about your experience with a product you haven't tried." It also says that in a video "the disclosure should be in the video and not just in the description uploaded with the video".
• The FTC's final rule banning fake reviews and testimonials, announced August 2024, covers testimonials that "misrepresent that they are by someone who does not exist, such as AI-generated fake reviews".

This is not legal advice. Read the rules for your platform and your country before the clip goes anywhere.

• No clip longer than 15 seconds. The ceiling is on the generation, not on the finished ad, so longer ads are stitched from parts.
• No 16:9 and no long form. Output is vertical, 1080 x 1920. This is a short-form tool.
• No API. Everything runs in the browser, so a hundred unattended renders is not something you can script.
• No ad account integration, no scheduling, no posting. You download the file and upload it to Meta Ads Manager, TikTok Ads Manager or wherever else yourself.
• No voice cloning of a named real person. Each creator carries its own voice.
• No analytics. Numbers live in the platform you posted to.

If any of those are load-bearing for you, find out now rather than after the first month. If none of them are, the loop is short: cast a creator once, then every new clip is a new 35 words. The AI influencer generator hub lists the rest of the wing, how to make UGC ads with AI is the full workflow, how to go viral on TikTok covers the organic side, and the Arcads alternatives page is the comparison if you are still shortlisting.