Key findings
- Native audio — sound generated in the same pass as the video — is still the exception, not the norm.
- Veo, Sora 2, LTX-2, WAN 2.5, PixVerse v5, Grok and the newest Kling tiers lead on in-pass audio.
- Many strong visual models are silent by design — you layer voiceover, music or SFX afterward.
- For talking-head and ad work, native audio + lip-sync changes the workflow more than raw fidelity.
Native audio vs. added audio
There are two very different things people mean by "AI video with sound." The common one is added audio — you generate a silent clip, then layer a voiceover, a music bed or sound effects on top. The rarer, more impressive one is native audio: the model synthesizes sound in the same generation pass as the picture, so footsteps land on footfalls, lips move to words, and ambience matches the scene.
Native audio is harder, and in 2026 it is still the exception. We checked every model on Vivideo to see which ones actually produce sound in-pass versus which are silent by design.
The models that do it
A handful of frontier models now generate native audio: Google's Veo line, OpenAI's Sora 2, Lightricks' LTX-2, Alibaba's WAN 2.5, PixVerse v5, xAI's Grok video, and the newest Kling tiers. The rest — many of them excellent on motion and realism — render silent, and you add audio in post.
| Native audio | Silent by design (add audio after) |
|---|---|
| Veo 3.1 / Veo 3.1 Fast | Hailuo (most tiers) |
| Sora 2 / Sora 2 Pro | Luma Ray 2 |
| LTX-2 / LTX-2 Pro | Pika, Vidu |
| WAN 2.5 · PixVerse v5 · Grok | Hunyuan, CogVideoX, Marey |
Lists are indicative and move fast as labs ship new versions — Vivideo keeps the live capability flags on each model.
Why it matters for your workflow
For pure B-roll, native audio barely matters — you were going to score it anyway. Where it changes everything is dialogue and ads: a model that generates a voice and matching mouth movement in one pass collapses a multi-step pipeline (generate → voiceover → lip-sync) into a single render. For talking-head, UGC and ad creators, that workflow shift is often worth more than a marginal bump in visual fidelity.
The practical rule on Vivideo: if your clip needs to talk, start with a native-audio model; if it just needs to look good, pick on visuals and add sound in the editor.
