Which AI Video Models Support Native Audio? (2026)

Of the 28 AI video models currently available through major APIs, only 15 support native audio generation— and the cost of audio varies wildly, from free (included in the base price) to a 100% surcharge. We mapped every model’s audio capability, pricing, and quality to help you decide when to generate audio natively versus adding it in post-production.

The cheapest audio: Grok Imagine Video at $0.05/sec with audio included free. The most expensive: Veo 3.1 4K + Audio at $0.60/sec. The key insight: audio adds 40–100% cost on most models, but two models — Grok and LTX-2 Pro — include it at no extra charge.

Prices verified: April 11, 2026.

Complete Audio Capability Matrix: All 28 Models

This table covers every model tracked on our platform. “Audio” means the model generates synchronized sound effects, ambient audio, or voice as part of the video output — not just background music added in post.

“Free” means audio is included in the base $/sec price with no surcharge. “Included” means audio is part of the standard output. HappyHorse 1.0 pricing is TBD (no public API yet).

The Cost of Audio: 40–100% Surcharge

The most important takeaway from this data: audio is not free on most models. When a model advertises $0.112/sec, that’s typically the silent-video price. Adding audio bumps it to $0.168/sec (Kling v3) or doubles it entirely ($0.20 to $0.40 for Veo 3.1). If your project budget assumes the base rate, you could be 50–100% over budget once you add sound.

Cheapest Models with Audio

If your project requires native audio, here are your options ranked by cost:

When to Use Native Audio

• Lip-sync content— If your video includes speaking characters, native audio is essential. Veo 3.1 has the best lip-sync quality; LTX-2 Pro is the cheapest lip-sync option at $0.06/sec.
• Sound effects tied to motion— Footsteps, door slams, splashes — sounds that must perfectly match on-screen action. Native generation handles timing automatically. Grok at $0.05/sec is ideal for these ambient clips.
• Quick social content— When you need finished video with sound in minutes, native audio eliminates the post-production step.

When to Skip Native Audio

• Music-backed content— If you’re adding a specific track anyway, paying for native audio generation is wasteful. Use a silent model like Kling 2.5 Turbo ($0.042/sec) and add music in post.
• Voiceover content— Professional voiceover with a specific voice requires a dedicated TTS tool. Generate silent video and layer the VO on top.
• Budget-constrained projects— If audio adds 50–100% to your cost and you can add acceptable audio in post for less, skip native audio. This is especially true at scale: 100 clips at $0.112/sec (Kling v3 silent) versus $0.168/sec (with audio) saves $56 on 10-second clips.

Notable Audio Gaps

Several popular models still lack native audio, which limits their use for finished content:

• Runway Gen-4— No audio, despite excellent Motion Brush control. The newer Gen-4.5 adds audio support.
• Minimax Hailuo and Hailuo 02 Pro— Both silent despite strong video quality. Minimax has announced audio support is in development.
• Pika 2.0 and Pika 2.5— Neither version supports audio. Combined with 720p max resolution, this limits Pika to prototyping and stylized content.
• Luma Ray 3— Silent, despite the older Luma Ray2 having audio support. A surprising regression in the newer model.

Recommendations

Best budget audio: Grok Imagine Video at $0.05/sec. Audio included free, 1080p output, fastest generation (~17 seconds). Ideal for social content and prototyping.

Best audio quality: Veo 3.1 at $0.40/sec (1080p + audio). Best-in-class lip-sync and sound design. Worth the premium for dialogue-heavy or cinematic content.

Best lip-sync value: LTX-2 Pro at $0.06/sec. Lip-sync with audio included at no extra cost. Open source (Apache 2.0). The most cost-effective path to talking-head content.

Best silent model: Kling 2.5 Turboat $0.042/sec. If you don’t need audio at all, this offers the best quality-per-dollar for silent video at 1080p.

For full pricing details, see our AI video pricing guide, or compare models side-by-side on the model comparison page.

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