The best AI video generators with native sound compared: Veo 3.1, Seedance 2.5 and the new Vidu Q4 — durations, resolutions, reference inputs and credit pricing on Orelon.
Quick answer: The best AI video generators with native audio today are Veo 3.1 (Google's flagship, now with first-and-last-frame control), Seedance 2.5 (the long-form pick, up to 30 seconds with an optional audio track) and the newly added Vidu Q4 (the multi-reference pick, casting up to 15 photos into one scene with generated dialogue). All three ship on Orelon, bill per second, and generate the soundtrack with the video — no separate TTS or music step.
Last reviewed: October 21, 2026. This guide is configuration-level: it reflects each model's generation settings as they run on Orelon today, plus Vidu Q4's provider documentation for the newest entry. We have not run a controlled quality benchmark across these models, and we make no benchmark-win claims — the ranking below is about which input and output options fit which job.
Why "native audio" changed the short-form workflow
A year ago, an AI video clip meant a silent MP4 and a second tool for the soundtrack. Native-audio models collapse that into one generation: dialogue is spoken by the characters in the scene, sound effects land where the action is, and you price one task instead of two. The practical consequences:
- Lip-sync is generated, not aligned. The model renders the mouth movement from the line it is also generating, so there is no drift between audio and video.
- Sound design follows the shot. Footsteps, room tone and impact sounds come from the same pass.
- One bill. Per-second pricing covers the whole clip; a failed task returns its credits instead of leaving you with a mute video and a TTS invoice.
The three, compared
| Veo 3.1 | Seedance 2.5 | Vidu Q4 | |
|---|---|---|---|
| Duration | 4 / 6 / 8 s | 4–30 s | 3–16 s, any integer |
| Resolutions | 720p / 1080p / 4K | 480p / 720p / 1080p | 540p / 720p / 1080p / 2K / 4K |
| Reference inputs | Up to 2 images; first & last frame control | Up to 30 images, up to 10 videos | Up to 15 images, up to 3 reference audio clips (MP3) |
| Aspect control | 16:9, 9:16, auto | 7 options incl. 21:9 and adaptive | Explicit on reference endpoint; inherited from first frame otherwise |
| Audio control | Generated with the clip | On/off switch | On by default; off for silent |
| Access tier on Orelon | Quality & Fast are premium; Lite standard | Premium | Premium |
| Best for | Polished 8-second hero shots | Long-form narration up to 30 s | Multi-character dialogue scenes |
Veo 3.1 — the polished hero shot
Google's Veo line made native audio mainstream, and Veo 3.1 on Orelon keeps the formula: pick Quality for the final render or Fast for iteration, feed up to two reference images, and hold the frame with first-and-last-frame control — start from a photo, end on a photo. The 8-second ceiling is the constraint to plan around: it is a trailer-length format, not a narration format. Resolutions run to 4K on both tiers, with a Lite tier available to free-tier users at 720p/1080p.
Seedance 2.5 — the long-form pick
Seedance 2.5 is the only native-audio model on Orelon that runs past 16 seconds — up to 30 seconds, long enough for a full product pitch or a scene with two exchanges of dialogue. It also accepts the widest reference set of the three (up to 30 images and up to 10 reference videos), which makes it the choice when a brand kit or prior footage should drive the look. Audio is a switch rather than a default: turn it on when you want the generated track, off when your edit will carry its own sound. A 720p render runs 60 credits per second without video input — a 5-second clip is 300 credits, the priciest per-second rate in this list, reserved for the longest clips.
Vidu Q4 — the multi-reference newcomer
Vidu Q4, added to Orelon this week, attacks the native-audio format from the casting side: reference-to-video takes up to 15 images — characters, outfits, locations — and builds one scene from them, with the prompt addressing each reference by order. Up to 3 MP3 reference clips pin a voice to a character, and generated dialogue plus sound effects come standard. Durations run 3 to 16 seconds at any 1-second step, with resolutions up to 4K. Like the others it is premium-tier; unlike them it has no text-to-video mode — every generation starts from at least one image. Our Vidu Q4 vs Kling 3.0 comparison covers where it lands against the established flagship.
Strong models that stay silent
Two widely used Orelon models are absent from the table because audio generation is not part of their setup today: Kling 3.0, the cinematic flagship best known for physics and camera work (its model page covers the 3–15 s, std/pro/4K range), and Grok Imagine 1.5, the fast text-to-video workhorse for 1–15 second social clips. If your edit adds voiceover or music afterward anyway, a silent model is not a downgrade — you are paying only for the picture.
How to choose
- Need dialogue spoken by your characters? Vidu Q4 is the only one that takes reference audio clips to cast a voice; Veo 3.1 generates dialogue from the prompt alone.
- Over 16 seconds? Seedance 2.5 is the only option — everyone else stops at 8 or 16.
- First frame and last frame fixed? Veo 3.1's frame control is built for match cuts and loops.
- Cheapest audio check? Start at the lowest resolution — Vidu Q4's 540p and Seedance's 480p exist for cast and pacing checks before the 1080p final.
- Free tier? Veo 3.1 Lite is the standard-tier entry point; the other two are premium models.
All three live in the Orelon video generator, one model-picker click apart. Credits bill per second and every price shows before you submit.
Native-audio video generators FAQ
What does "native audio" mean for an AI video model?
The model generates the soundtrack — dialogue, sound effects, ambience — in the same pass as the frames, instead of returning a silent clip. Lip movement and speech stay in sync because they come from one generation.
Which AI video models generate audio on Orelon?
Veo 3.1 (Quality, Fast and Lite), Seedance 2.5 (audio switch), and Vidu Q4 (audio by default, off switch available). Kling 3.0 and Grok Imagine 1.5 do not generate audio in their current Orelon configuration.
Can a model use my own voice recording?
Vidu Q4 accepts up to 3 reference audio clips (MP3, 3–12 seconds each) that the scene can attach to a character. The others generate voices from the prompt text only.
What is the longest clip with generated audio?
Seedance 2.5, at up to 30 seconds. Vidu Q4 reaches 16 seconds, Veo 3.1 stops at 8.
How much does a native-audio clip cost?
All three bill per second and show the total before you submit: Veo 3.1 and Seedance 2.5 price by resolution tier, Vidu Q4 from 10 credits per second at 540p to 73 at 4K. A 720p 5-second Vidu Q4 clip, for example, is 90 credits. Failed tasks return their credits.
Do I need paid access?
Veo 3.1 Lite is on the standard tier and open to free-tier users; Veo 3.1 Quality/Fast, Seedance 2.5 and Vidu Q4 are premium models included with paid plans on the pricing page.
Pick one and render
For an 8-second hero shot, Veo 3.1 Quality. For a 30-second pitch, Seedance 2.5. For a cast of characters actually saying lines, Vidu Q4 — start at 720p to check the cast, then pay up for the 2K or 4K final. All three are waiting in the video generator.