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

TL;DR: DubVoice.ai bundles 6 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.

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, and every tier renders 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 — 9,100 credits. The only tier that renders 9:16 natively, and the one to use for Reels and Shorts.
• Veo 3.1 Quality — 17,000 credits. The most detailed and the slowest (120-180s). Worth it for a final cut, wasteful for drafts.

Every tier supports 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.

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.

Native audio is the line that actually divides this list

Every model here makes moving pictures. Only the Veo family makes sound, and that single difference decides more projects than resolution or price does.

If your clip needs someone to speak, or needs footsteps and rain to land with the picture, the Veo family is the shortlist — everything else hands you a silent clip you then have to score. That is not a small extra step: matching sound effects to a generated shot afterwards is fiddly and often ends up costing more time than the render saved.

If the clip sits under a voiceover you recorded anyway, native audio is worth nothing to you, and the cheaper silent models are the better buy. Decide that first and most of the table stops mattering.

What the per-clip prices really mean

A flat rate and a per-second rate reward opposite habits.

Meta AI is flat per clip, so length is free but also not yours to choose. That is ideal for mood tests and throwaway social, and wrong whenever you have a fixed slot to fill.

Omni Flash charges by duration, so a four-second clip genuinely costs half of an eight-second one. When you know a shot only needs three seconds on screen, that is real money rather than a rounding difference.

Veo is fixed at eight seconds per render. Cutting a Veo clip down to two seconds in the edit means you paid for eight — so plan Veo shots as eight-second beats rather than trimming them later.

Iterating without spending the budget on drafts

The same cheap-first discipline that works for images works here, and matters more because video costs an order of magnitude more.

Find the prompt on the cheapest model that supports your aspect ratio. You are not judging fidelity at this stage — you are checking whether the camera moves the way you meant, whether the subject is where you expected, whether the idea reads at all. Those failures look identical at 2,000 credits and at 17,000.

Once the prompt is right, render the final on the tier the output deserves. A drafting pass plus one quality render usually costs less than three quality renders, which is what happens when you start at the top.

Get Started

All 6 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.