AI video generator. Cinematic results.

Choosing an AI video generator normally means committing to one provider and hoping it handles every shot. Unify puts the whole field behind one login. Sora 2 and Sora 2 Pro from OpenAI handle complex motion and multi-part prompts with strong scene coherence, and Pro extends duration and resolution. Google's Veo 3.1 is the strongest all-rounder for cinematic material with native audio. Kling 3 excels at human motion and physical realism. Seedance 2.5 is fast and remarkably consistent for its cost. Runway Gen-4 gives directors the most control, and Luma Ray produces fluid, naturalistic camera movement. You can render the same prompt through two of them and pick the winner rather than arguing about benchmarks.

Text-to-video is how most people start: describe a shot and the model builds it. Image-to-video is how most people finish. Supply a still — a product photo, a character render, a frame you already approved — and the model animates it while preserving what you locked in. That workflow matters because character and product consistency is the hardest problem in generated video, and starting from a fixed reference sidesteps most of it. Generate your key frame with an image model, approve it, then animate. Unify supports both directions on the models that offer them, and you can move a reference between models without re-uploading.

Match the model to the hardest thing in the frame. If a person has to move convincingly — walking, gesturing, speaking — start with Kling 3, which handles human motion and weight better than the alternatives. For a landscape, an establishing shot, or anything where the camera is the performer, Veo 3.1 and Luma Ray produce more natural movement. If the prompt has several instructions that all need to land — a specific action, in a specific place, with a specific mood — Sora 2 follows multi-part direction most reliably. When you are iterating on timing or blocking and do not need final quality, render on Seedance 2.5 first; it is fast and cheap enough to treat as a previz pass, then re-render the approved shot on a higher-tier model.

Not every model does everything, and planning around the limits saves credits. Veo 3.1 generates native audio alongside the picture, so dialogue and ambience arrive with the shot rather than in a separate pass. Others are silent by default and expect you to add sound afterwards — Unify includes ElevenLabs for music and voice, so that stays in one workspace. Clip length runs from a few seconds up to twenty on the longer-form models, and resolution ranges from 720p to 1080p and beyond depending on tier. The practical consequence is that you build sequences from short generated shots and cut them together, the same way real footage is shot and assembled.