What Is the Best AI Video Generator With Audio?

Short answer

Seedance 2 is the best AI video generator with audio for cinematic quality ($0.334/s, native synchronized sound). Manifold Video is the pick for control, bundling keyframes and generated audio from ~101 credits (~$1.01). All other served models are silent.

The evidence

Only two families generate synchronized audio.

Seedance 2 variants (text, fast, image-to-video, reference) and native Manifold Video produce matched audio tracks; Wan, LTX, Happy Horse, and RA2V are silent.

Seedance 2 pairs top quality with sound.

Cinematic motion at $0.334/s (~$1.67 per 5s) in 720p or 1080p with generated audio included.

A faster audio-capable draft exists.

Seedance 2 Fast keeps native audio at $0.266/s, about $1.33 per 5s from 128 credits.

Audio comes bundled with shot control.

Manifold Video includes generated synchronized audio with ordered keyframes and exact stop frames from ~101 credits (~$1.01).

Silent models can still get soundtracks cheaply.

Add full music tracks for $0.35 flat (30-300s, vocals or instrumental), SFX at ~$0.86 per 5s estimate, or TTS voiceover on the same account.

Generated on ManifoldGen

The female Viking shield-maiden emerging from an icy fjord during a snowstorm mouths the lyric quietly at first then opens up, small nods on the beat, expression building. Camera: slow pull back. environment alive aro...

a couture walk on a stadium catwalk with slow camera in a neon-lit rooftop, rises through layered atmosphere; steady arc from silhouette into light, cinematic 16:9, museum spotlights in gentle haze; natural motion, co...

API index smoke video aurora kiwi beacon 20260810 1222 nz, a luminous green kiwi walking beneath moving aurora curtains, locked camera

an elegant older stateswoman in a silk scarf in a seated silhouette against a window, in a blue-hour city apartment, editorial glamour photography, gentle reflected light, seafoam and copper palette, no text, no logo,...

a celestial priestess with haloed candlelight in a seated silhouette against a window, in a brutalist concrete atrium, Renaissance chiaroscuro oil portrait, careful geometric composition, jade and charcoal palette, no...

a glass monorail in crisp winter sunlight, modernist poster illustration, gentle reflected light, indigo and pearl palette, no people, no text, no logo, no watermark

a couture catwalk muse with razor cheekbones in a seated silhouette against a window, in a silent desert at twilight, Renaissance chiaroscuro oil portrait, crisp material detail, jade and charcoal palette, no text, no...

a travel influencer posing on a cliffside at golden hour in a seated silhouette against a window, in a silent desert at twilight, Vogue-style studio portraiture, soft volumetric light, garnet and warm grey palette, no...

a cliffside observatory under overcast coastal light, modernist poster illustration, gentle reflected light, indigo and pearl palette, no people, no text, no logo, no watermark

Also worth knowing

Seedance 2 Fast at ~$1.33 per 5s when you need audio drafts quickly
Wan plus a $0.35 music track when silence is acceptable in review cuts

Frequently asked questions

+Do AI video generators generate sound too?

On ManifoldGen, only Seedance 2 variants and Manifold Video generate synchronized audio natively. Wan, LTX, Happy Horse, and RA2V output silent video.

+How much is AI video with audio?

From ~101 credits (~$1.01) per Manifold Video clip including generated audio. Seedance 2 costs $0.334/s, about $1.67 per 5s.

+Can I add audio to a silent AI video?

Yes. Full music tracks cost $0.35 flat, SFX estimate ~$0.86 per 5 seconds, and TTS voiceover runs on the same credit balance.

Check our work

Every price here is live at /api/pricing — and every model runs in Studio on the same balance.

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