Sora vs Veo 3 vs CogVideo: Best AI Video Generator (2026)

Start here, because it decides everything else. Sora is being discontinued: OpenAI announced it on March 24, 2026, shut down the Sora app and sora.com on April 26, 2026, and set the API to stop on September 24, 2026. So if you are reading a comparison that says "sign up for Sora," it is out of date, and that is the whole reason "Sora alternative" and "Veo 3 alternative" are suddenly busy searches.

Veo 3 and CogVideo are both live and taking new users, so this is really about the on-ramp. Veo 3.1 is live, but the affordable Google AI Pro tier only includes a limited Veo 3.1 trial, and full access sits on the pricier Ultra plan, so "available" comes with a paywall for the good stuff. CogVideo (us) is built to remove the friction: it runs the open source CogVideoX model on our servers, so there is nothing to install and no GPU required, you can generate your first clips free without a card, and if you specifically want Veo 3.1, we host it so you can run it here by the credit. That free, no-setup on-ramp is why we take this round. It is an access claim, not a quality claim.

One honest caveat about us: "free to start" is a trial, not an unlimited free-forever plan, and the browser convenience means you are on our servers rather than running the weights yourself. If you want to run CogVideoX locally instead, it is open source and you can, though that needs an NVIDIA GPU.

Let us be honest up front: nobody here publishes independent, apples-to-apples quality benchmarks, so every "best quality" claim (ours included) is marketing until you test it on your own prompt. What you can compare is what each ships. Sora set the bar with Sora 2 and Sora 2 Pro, which added more physical realism and synchronized sound, and it is genuinely why people got excited about AI video. The catch, again, is that it is being retired.

Among tools you can actually keep using, Veo 3 is the quality leader. Veo 3.1 outputs at up to 1080p and 4K and is Google's flagship, tuned for prompt accuracy and clean, finished-looking frames, which is the closest like-for-like to what Sora 2 was reaching for. On sheer resolution and overall polish it leads this group, so it takes the quality round.

Where do we land? Honestly, in third on the base model. Our CogVideo v1 is built on the open source CogVideoX model, which is impressive for something open and free to run, but it does not match the top proprietary models on raw fidelity. We close some of that gap in a specific way: because we host Veo 3.1 (the Fast tier, at 1080p) on the same platform, you can generate with Google's model here too when a clip needs it, and pay by the credit rather than by the month. But if pure fidelity from the base model is your only axis, Veo is ahead of us, and we are not going to pretend otherwise.

This is the feature that made Sora 2 feel like magic, and it is now Veo 3's clearest win. Veo 3.1 generates synchronized audio together with the video in a single step: dialogue, sound effects, and ambient noise that actually match what is on screen. For a shareable clip that needs to feel finished, that is a big deal, because you skip a whole separate audio pass. If "AI video with sound" is what you searched for, Veo is the answer.

Sora 2 had synchronized sound too, and it was part of the hype, but it is going away, so the live crown is Veo's. Our base CogVideo v1, being built on the open CogVideoX model, does not generate native audio at all, so on the base model you would add sound yourself afterward. The upside for us is specific: when you run Veo 3.1 through our platform you get its audio, so you can have the native-sound feature here without a Google plan. But that is Veo's feature, not ours, and we will credit it honestly: on sound, Veo is ahead.

Need more than a few seconds? Sora was generous here: it could generate up to 20 seconds natively and extend to about 120 seconds total, at up to 1080p on Sora 2 Pro. That ceiling is leaving with the product, though. Among tools you can still use, Veo 3.1 generates 8 second clips natively and can lengthen them with scene extension to roughly two and a half minutes, which is plenty for most social and ad use and comes with the audio and resolution advantages already covered. So Veo takes this round.

Our clips are the shortest: the base CogVideo v1 makes roughly six-second videos, and the hosted Veo 3.1 on our platform runs to its usual eight seconds. That is fine for a social loop, a product teaser, or a quick idea, but if you are scoring something long, Veo gives you far more runway on a live product, and we will happily say so.

This is where a lot of "free AI video generator" searches actually start, so let us be blunt, and clear about which numbers are firm. Sora's consumer pricing is gone with the app, so there is no live number to quote. Veo 3.1 is reached through Google's AI plans: the Pro tier (reported around $20 a month) includes only a limited Veo 3.1 trial, and full access needs the Ultra tier (reported from about $100 a month). Google's consumer prices render in local currency on the official page, so treat those USD figures as approximate.

Our pricing is built to be the low-friction option. You start free with no card, then subscriptions run $9.90, $24.90, and $49.90 a month (about 30 percent off on annual), and credits are consumed per generation, with the lighter models costing only a handful of credits each. The thing neither competitor does: Pay Once. If subscriptions make your eye twitch, you can buy a one-time credit pack ($29.90, $69.90, or $149.90) that stays valid for a year. And here is the practical kicker: because we host Veo 3.1, you can generate with Google's model here from about 100 credits a clip (the exact cost is quoted per generation) instead of committing to a $100-plus Ultra plan.

So on "cheapest to start and least commitment," we win: free to start, the lowest subscription here, a pay-once option, and metered access to Veo 3.1. Fair counterpoint, and we will say it ourselves: if you want the absolute best of Veo at scale, Google's own top plan gives you more Veo headroom than buying credits a clip at a time, and if you want unlimited heavy use for free, none of these gives you that.

Here is the round we are actually built to win, and it is an access claim, not a quality claim. Sora was a closed, cloud-only app (and it is now closing), and Veo is a closed, cloud-only product reached through Google's apps and API. Both are perfectly valid choices, they just mean there is no "take the model and run it yourself" option, and getting the best of Veo can mean Google's top plan.

CogVideo removes the friction on purpose. It runs the open source CogVideoX model (developed by THUDM / Zhipu AI, repository at github.com/zai-org/CogVideo) on our servers, so there is nothing to install and no GPU required, and you can generate your first clips free without a card, right in the browser. And because CogVideoX is open source, you are not locked in: if you do have an NVIDIA GPU, you can download the weights and run them locally, no subscription involved. With the standard memory optimizations, CogVideoX-2B runs from about 4 GB of VRAM and CogVideoX-5B from about 5 GB (more if you run the full-precision weights).

The honest caveats: "free to start" is a trial, the browser convenience means generation runs on our servers unless you self-host, and one precision point people ask about: the CogVideoX code and the 2B model are Apache 2.0, while the larger 5B weights carry their own CogVideoX license, so read those terms if you plan to redistribute. Even with those caveats, on "free, no GPU, and an open model you could self-host," neither Sora nor Veo competes, so this round is ours.