On Oakgen, five video models generate audio in the same run as the video: Kling v3 Pro, Seedance 2.5, Seedance 2.0 Fast, MiniMax H3 Max and Grok Imagine Video. As of 2026-10-25 they cost between 17 credits per second (Grok Imagine Video and MiniMax H3 Max at 480p) and 394 credits per second (Seedance 2.5 at 1080p). A clip with synced ambient sound and dialogue reads as footage. A silent clip with a TTS voice glued on top still reads as an AI demo.
The April 2026 version of this page ranked HappyHorse 1.0, Seedance 2.0, Veo 3, Kling 3.0 and Sora 2 and gave them scores. We have no records of the test behind those scores, so we removed them. Several of those models are also gone. Oakgen retired HappyHorse on 2026-09-27, the Sora 2 API was removed on 2026-09-24, and the Veo 3.1 preview in the Gemini API shut down on 2026-10-22 (Veo 3.1 is still on Vertex AI, but not on Oakgen). This version lists the native-audio models Oakgen runs today, from Oakgen's model configs.
Through 2024 and 2025, the AI video conversation was about resolution and clip length. The differentiator in 2026 is audio, and how it is made. Some models generate the video and its audio together. Others render the picture first and need a separate TTS or sound-design pass, which then has to be lined up in an editor.
What does "native audio" mean in AI video?
Native audio means the model makes the soundtrack in the same generation as the picture. Three things follow from that:
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Sync comes from generation, not from post. A bolt-on pipeline renders a video, then generates audio on a separate model that has to be aligned in an editor, and small offsets are audible.
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Lip movement follows the speech the model is generating. A bolt-on pipeline has to warp the lower face to match a voice it did not make, and the warp shows on close shots.
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Ambient sound can match the scene. Footsteps, traffic and room tone come from a model that also drew the scene, instead of from a sound library with no view of the picture.
On a phone speaker the gap is sometimes invisible. On headphones or a TV, it is easier to hear.
Which Oakgen video models generate native audio?
These are the Oakgen video models whose settings include audio generation, read from Oakgen's model configs on 2026-10-25. Credit prices come from Oakgen's pricing table on the same date, and the generator shows the price before you run.
| Model | Audio | Max clip | Resolution | Credits per second |
|---|---|---|---|---|
| Kling v3 Pro | On or off | 15s | 1080p | 57 with audio, 38 without |
| Seedance 2.5 | Yes | 30s | 480p, 720p, 1080p | 75, 160, 394 |
| Seedance 2.0 Fast | Yes | 15s | 480p, 720p | 37, 82 |
| MiniMax H3 Max | Yes | 15s | 480P, 768P, 1080P | 17, 28, 55 |
| Grok Imagine Video | Yes | 15s | 480p, 720p | 17, 24 |
We did not score these models against each other for this article. The table holds settings and prices, not quality ratings.
Kling v3 Pro: audio you can switch off
Kling v3 Pro renders 1080p and lets you turn audio generation on or off. With audio on it costs 57 credits per second, so a 5-second clip is 284 credits. With audio off it costs 38 credits per second, which suits clips you will score in post. It runs from 3 to 15 seconds and offers 16:9, 9:16 and 1:1.
Seedance 2.5: the longest native-audio clips
Seedance 2.5 generates native audio and runs up to 30 seconds, the longest of the five. It also has image-to-video with an optional end frame, and a reference mode guided by image, video and audio references. That reference mode helps when a voice or a brand look must carry across clips. It is the most expensive per second, at 75 credits at 480p and 394 at 1080p.
Seedance 2.0 Fast and MiniMax H3 Max: lower-cost options
Seedance 2.0 Fast generates native audio at 480p or 720p for 37 or 82 credits per second, and accepts multimodal references. MiniMax H3 Max generates audio at 480P, 768P or 1080P for 17, 28 or 55 credits per second, and takes start and end frames or image, video and audio references. Both run up to 15 seconds.
Grok Imagine Video: the cheapest per second
Grok Imagine Video lists native audio and runs from 3 to 15 seconds at 480p or 720p, for 17 or 24 credits per second. It is the cheapest way on Oakgen to test whether a prompt works with sound before you render the final version on a higher-resolution model.
Generate Native-Audio Video on Oakgen
When is bolt-on audio the right choice?
The native-audio-vs-bolt-on framing isn't religious. Three workflows where bolt-on still wins:
Music videos with locked tracks. When the audio is a finished song, render the visual with audio off (Kling v3 Pro with audio off costs 38 credits per second) and drop the song under it.
Brand work with locked voiceover. Agency work usually has VO already recorded. Render the visual mouth-closed or with B-roll cutaways during dialogue, drop the locked VO under it.
Editorial B-roll scored in post. When a music editor will score the cut, the model's native ambient audio gets stripped anyway. Pick the model with the best motion and price for your length and skip the native-audio premium.
For talking-head ads, narrative shorts, product walkthroughs with ambient sound and lip-synced character dialogue, native audio saves a separate sync pass.
What do native-audio models still do badly?
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Long dialogue. Most of these models cap at 15 seconds, and Seedance 2.5 at 30. A longer monologue means stitching clips, and the handoff between them is hard to hide.
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Singing. These models are built for speech and ambient sound. For a music video, render the visual and drop a real or AI-generated track (Lyria 3.5 or Eleven Music on Oakgen) underneath.
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A finished mix. A native-audio model gives you ambient sound that matches the scene. It does not give you a broadcast mix. Plan a sound-design pass in your DAW for broadcast work.
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Which model should you use for each job?
- Talking-head UGC ads: Seedance 2.0 Fast or MiniMax H3 Max for tests, Kling v3 Pro or Seedance 2.5 for the final cut.
- Clips longer than 15 seconds with sound: Seedance 2.5, up to 30 seconds.
- Image-to-video with native audio: Seedance 2.5 (with an optional end frame) or MiniMax H3 Max (start and end frames).
- High-volume tests with sound: Grok Imagine Video or MiniMax H3 Max at 480p, 17 credits per second.
- Music-bed atmospheric clips: Kling v3 Pro with audio off.
How we checked this
Model settings (audio, durations, resolutions, references) come from Oakgen's video model configs, and credit prices from Oakgen's pricing table, both read on 2026-10-25. The shutdown dates come from the vendors' own pages as checked for Oakgen's blog refresh on 2026-10-25. We did not run the models side by side, so this page gives no quality scores.
What to Read Next
- The best HappyHorse alternatives -- what replaced HappyHorse 1.0 after Oakgen retired it.
- Sora 2 shutdown: the best replacements -- where to go now that the Sora 2 API is gone.
- Seedance 2.5 vs Kling 3 vs Veo 3.1 -- a comparison of the three models.
