Top AI Video Generators from Audio 2026
Compare leading 2026 models that convert audio files into video. Review specs for Seedance 2.0, Kling 3.0, Veo 3.1 and the lip-sync models that pair them with audio.
TL;DR
Audio-to-video on Flixly runs through lip-sync models such as LatentSync, Sync LipSync and Volcengine Lip Sync, which align mouth movement to a target audio track. Seedance 2.0 (4–15 second clips) and Kling 3.0 (3–15 second clips) generate the footage from text or images rather than from audio. Credit cost varies by model and is quoted before each generation. The workflow starts with audio creation via text-to-speech or music tools before video rendering.
Audio-to-video generators create moving footage from sound files rather than text prompts alone. They exclude pure text-to-video systems that ignore audio tracks.
How audio drives the generation pipeline
Models first extract features such as pitch, timing, and phonemes from the input waveform. On Flixly that step runs in dedicated lip-sync models (LatentSync, Sync LipSync, Volcengine Lip Sync). Seedance 2.0 and Kling 3.0 take text or image input rather than audio, so they generate the footage the lip-sync step works on. Veo 3.1 generates video with native audio and outputs 720p, 1080p or 4K clips of 4, 6 or 8 seconds.
The pipeline then renders frames conditioned on both the audio embedding and any reference image. This produces lip-synced output when the audio contains speech.
Concrete inputs and outputs
Users upload the target audio track together with the video to animate. The lip-sync model aligns mouth movement to the audio and returns the synced clip.
Text to Speech converts typed lines into the driving audio before video generation begins. Voice Cloning matches a target speaker's timbre from a reference recording.
Where these tools fit in real workflows
Short-form creators feed podcast clips into lip-sync tools to animate static photos. Music producers use Music Generation to create a track, then render a shareable video for it with Music Video.
News teams combine Auto Captions with generated video to produce 60-second explainers from voice-over tracks. Character-consistent series rely on reference images plus cloned voices for multi-shot sequences.
Top models compared
Seedance 2.0 renders 4–15 second clips at 480p, 720p, 1080p or 4K from text, image or reference input. It does not take audio as input, so pair it with a lip-sync model for dialogue. The app quotes its cost per generation up front.
Kling 3.0 renders full-body dance sequences of 3–15 seconds from text or image input. Output resolution reaches 4K, with 720p and 1080p also available.
Veo 3.1 generates video with native audio in one pass. It limits clips to 4, 6 or 8 seconds and quotes the cost of a 720p, 1080p or 4K export before you run it.
Wan 2.7 turns text or image prompts into abstract visuals of 2–15 seconds at 720p or 1080p.
Volcengine Lip Sync aligns mouth movements in an existing video with a target audio track and supports multilingual dubbing. (Sora 2, listed here previously, was retired on 2026-09-24.)
Workflow checklist
- Record or generate the driving audio track first.
- Choose a reference image.
- Select a duration the model supports (4–15 seconds on Seedance 2.0, 4, 6 or 8 seconds on Veo 3.1).
- Run the generation and review the MP4 output for sync drift.
| Model | Max Clip Length | Input Types Supported | Credit Cost | Resolution |
|---|---|---|---|---|
| Seedance 2.0 | 15 s | Text, image, reference | quoted in-app | Up to 4K |
| Kling 3.0 | 15 s | Text, image | quoted in-app | 4K |
| Veo 3.1 | 8 s | Text, image, reference | quoted in-app | Up to 4K |
| Wan 2.7 | 15 s | Text, image, reference | quoted in-app | 1080p |
Start simple with a short voice line and a headshot reference on the Lip Sync Video page.
Frequently Asked Questions
Which model gives the lowest sync error for dialogue clips?▾
Neither Seedance 2.0 nor Kling 3.0 takes audio as input, so for dialogue clips use a dedicated lip-sync model such as Sync LipSync, LatentSync or Volcengine Lip Sync.
Can I use generated music as the only input?▾
Yes. Music Generation creates the track, and Music Video renders a shareable video for it. Wan 2.7 does not take audio as input, but it can generate 2–15 second abstract sequences from a text prompt to cut against the track.
How long does an 8-second generation take?▾
Generation time varies by model, resolution and queue. Veo 3.1 clips run 4, 6 or 8 seconds at 720p, 1080p or 4K.
Do these tools support reference images for character consistency?▾
All four listed models accept an input image for image-to-video. Seedance 2.0, Veo 3.1 and Wan 2.7 also support reference-to-video; Kling 3.0 does not.