AI Video Generation in 2026: Veo 3.1, Meta AI, Omni Flash, Grok & Kling Compared

> TL;DR: DubVoice.ai bundles 8 AI video models on one pay-as-you-go credit balance. Meta AI is the cheapest way in at 2,000 credits per clip. Omni Flash starts at 4,688 for 4 seconds. Veo 3.1 Fast is the sweet spot at 7,500 with native audio. Veo 3.1 Quality tops the family at 17,000. Kling 2.5/3.0 are the premium tier from 75,000.

Every model below runs from the same credit balance — no separate subscription per provider, and credits never expire.

The line-up at a glance

1080p output on the Veo family costs roughly 1.5x the 720p figure.

Meta AI — the cheapest way to test an idea

At 2,000 credits a clip, Meta AI is by a wide margin the cheapest model here. It supports square (1:1) alongside the usual landscape and portrait ratios, and renders at 480p or 720p.

It also handles image-to-video differently from the rest: instead of a list of reference images, you give it a start frame and, optionally, an end frame — Meta then interpolates between the two. That makes it well suited to "take this product shot and give it life" style clips.

Meta returns its own clip length, so there is no duration setting to pay for.

Best for: rapid iteration, square social posts, cheap image-to-video.

Omni Flash — fast and duration-priced

Omni Flash is the quickest turnaround in the list (typically 30-90 seconds) and prices by duration rather than a flat rate: 4,688 credits for 4s, 6,250 for 6s, 7,813 for 8s, 9,375 for 10s.

It is widescreen-only (16:9 or 9:16) at a fixed 720p, and accepts up to 7 reference images as visual context — more than any other model here.

Best for: short social clips where you want several reference images steering the look.

Veo 3.1 family — the only models with native audio

Google's Veo 3.1 is the only family here that generates native audio — dialogue and sound effects baked into the clip, not added afterwards. Fixed 8-second output, 16:9 or 9:16.

• Veo 3.1 Fast — 7,500 credits. The best value in the family and the one to reach for by default.
• Veo 3.1 Lite — 13,000 credits. Despite the name it costs more than Fast; Fast moved to a cheaper rendering tier and halved in price.
• Veo 3.1 Quality — 17,000 credits. The most detailed and the slowest (120-180s). Worth it for a final cut, wasteful for drafts.

All three support a start frame, a start + end frame pair, or up to four reference images used as scene / character / style context.

Best for: anything where you want speech or sound without a separate audio pass.

Kling 2.5 & 3.0 — the premium tier

Kling sits well above the rest on price: 75,000 credits for 2.5 standard, 125,000 for 3.0 standard, with professional modes at 100,000 and 150,000. Both render 720p or 1080p.

Best for: hero shots where per-clip cost is not the constraint.

Grok Imagine — the widest aspect-ratio support

xAI's Grok Imagine is the only model that accepts 1:1, 2:3 and 3:2 alongside the standard ratios, and the only one offering 480p as a cheaper option. Clip length is 6, 10 or 15 seconds.

Give it a reference image and it automatically switches to image-to-video; leave it out and it runs text-to-video.

Best for: unusual aspect ratios and longer single clips.

Which should you pick?

• Testing an idea cheaply? Meta AI at 2,000 credits.
• Need speech or sound effects? Veo 3.1 Fast — nothing else generates audio.
• Fast social clip with reference images? Omni Flash.
• Square or portrait-first? Meta AI or Grok Imagine.
• Animating a still? Meta AI (start frame) or Grok Imagine (reference image).
• Final hero shot, budget open? Veo 3.1 Quality or Kling 3.0.

Get Started

All 8 models are available from your DubVoice.ai dashboard and through the [public API](/dashboard/api-docs). One credit balance covers every one of them — no separate subscriptions. Start with Meta AI or Omni Flash to find your prompt, then re-render the winner on Veo 3.1 Quality.