How to make TikTok shorts with AI in 2026 (full workflow + free tools).

To make a TikTok short with AI, generate a 9:16 clip from a text prompt in a video model, burn in captions, then export and upload — no editor needed, and you can do it free. TikTok's algorithm rewards consistency: 1 short per day for 30 days beats 1 viral hit. AI video tools turn that 30-day commitment from "impossible" into "coffee break."

This is the workflow we use to produce daily TikTok shorts at the getvivix studio. Five minutes per clip, $0.50 per render, no Premiere Pro or CapCut required.

What you need

• A free getvivix account (30 credits, no card)
• An idea for a 10-second clip
• A TikTok account

That's it. No editing software, no expensive subscription.

Step 1: Pick your model

For TikTok shorts, the sweet spot is Veo 3.1 Fast (cheapest, native audio, 720p which TikTok upscales fine) or Kling 3.0 Standard (cheaper still, no audio but TikTok will let you overlay music anyway).

Open getvivix Text-to-Video and pick one. The credit cost is shown before you click generate. If you already have a photo or a still you want to animate instead of starting from a prompt, use Image-to-Video and feed it that frame. Not sure which model fits your clip? Our Sora vs Veo vs Kling breakdown walks through the trade-offs.

Step 2: Write a prompt that works in 9:16

Vertical video has rules. The eye reads top-to-bottom, not left-to-right, so:

• One subject, centered. Multiple subjects fight for attention in a narrow frame.
• Vertical motion beats horizontal. Pan up/down or zoom, not side dolly.
• High contrast. TikTok thumbnails are tiny — bold colors and strong silhouettes win.
• First 1.5 seconds = the hook. Front-load the wow.

Example prompts that work:

• "A neon goldfish swims toward the camera in a dark aquarium, slow zoom in, cinematic, 9:16"
• "Hands kneading dough on a marble counter, top-down view, soft window light, 9:16 vertical"
• "A tiny astronaut on a blue planet looks up at three moons, slow tilt up, 9:16, cinematic"

Step 3: Generate at 9:16

Set the aspect ratio to 9:16in the getvivix model controls. Most models support it natively; for the few that don't (some older Wan versions), getvivix auto-crops with subject detection so the speaker stays centered.

Hit generate. Veo 3.1 Fast finishes in ~30 seconds; Kling in ~60.

Step 4: Add captions (the algorithm boost)

TikTok watch-time goes up ~40% with burned-in captions (Sprout Social study, 2024). Open getvivix Caption Studio:

1. Drop the rendered MP4
2. Whisper transcribes every word with timing in ~10 seconds
3. Pick a viral caption style (Bold TikTok works best)
4. Drag any line you want to fix and edit the text
5. Export 9:16 with captions burned in

1 clip credit per export. Free signup includes 1 clip credit. The same captioning flow powers our 5-minute podcast captioning guide if you want longer-form subtitles too.

Step 5: Hook test before you post

Before uploading to TikTok, watch the first 1.5 seconds with sound off. If you don't feel a pull, the clip won't hold a stranger either. Re-prompt with a bolder opening shot and burn another credit.

Step 6: Upload + caption + tags

• TikTok caption: 1 sentence, 1 question. Questions drive comments. Comments drive distribution.
• Tags: 3-5 max. Mix one big (#ai), one medium (#aivideo), one niche (#aivideoartist).
• Sound: if your clip has Veo native audio, leave it. If silent, pick a trending sound — TikTok's algorithm bumps clips using trending audio.

Multi-platform: post once, distribute everywhere

Same 9:16 MP4 also works for:

• Instagram Reels(re-upload, don't cross-post — Reels demotes obvious cross-posts)
• YouTube Shorts (auto-detected as Short if vertical and under 60s)
• X / Twitter (vertical works, just not optimized)
• LinkedIn (yes, vertical AI clips perform well there now)

See the dedicated YouTube Shorts Maker page for the Shorts-specific workflow.

Cost breakdown for daily posting (30 days)

• 30 generations × $0.40 (Veo Fast) = $12
• 30 captioned exports × ~$0.12 each = $3.60
• Total: ~$16/mo for 30 daily TikTok shorts

Vs. Sora.com Pro at $200/mo or hiring an editor at $50/clip ($1,500/mo).

Common mistakes

1. Generating at 16:9 then cropping

You lose ~50% of the visual information. Always generate at 9:16 native.

2. Skipping captions

85% of TikTok is watched with sound off in public. No captions = no watch time.

3. Putting the hook at second 5

The algorithm decides at ~1.5 seconds whether to keep showing your video. The cool part needs to be first, not last.

4. Using one model for everything

Different shots need different models. Human dancing? Kling. Cinematic narrative? Sora. Dialogue or SFX? Veo. getvivix lets you swap mid-session.

Frequently asked

How do I make a TikTok short with AI for free?

Sign up for a free getvivix account (30 credits, no card), generate a 9:16 clip in Text-to-Video, add burned-in captions in Caption Studio, then export and upload to TikTok. The free tier covers roughly 3 generations and 1 captioned export, enough to post your first short tonight.

Which AI model is best for TikTok shorts?

Veo 3.1 Fast is the cheapest model with native audio and 720p that TikTok upscales cleanly. Kling 3.0 Standard is cheaper still but has no audio, so overlay a trending sound. For dancing or human motion use Kling, for cinematic narrative use Sora, and for dialogue or sound effects use Veo.

Do AI TikTok videos need captions?

Yes. Most TikTok viewing in public happens with sound off, so burned-in captions hold watch time that silent clips lose. Drop your MP4 into getvivix Caption Studio, let Whisper transcribe it, pick a viral style like Bold TikTok, and export 9:16 with captions baked in.

How much does it cost to post daily AI TikTok shorts for a month?

About $16 a month: roughly 30 Veo Fast generations at $0.40 each plus 30 captioned exports at around $0.12 each. Compare that to Sora.com Pro at $200 a month or an editor at $50 per clip, and the math is hard to argue with.

What aspect ratio should AI TikTok videos use?

Generate natively at 9:16. Cropping a 16:9 clip down throws away about half the visual information. Set the aspect ratio in the getvivix model controls before you generate, and most models output vertical directly.

Try it tonight

Sign up free — 30 credits + 1 clip credit, enough for ~3 generations and 1 captioned export. See if AI video shorts fit your channel before paying anything.