AI video went from uncanny slideshow to genuinely usable in about eighteen months, and the field has a clear top tier now. It also has a cautionary tale, because the tool most people would have named first is being switched off. Here is the honest 2026 buyer guide, sorted by the job you need doing.
The short version
Veo 3.1 for realistic, cinematic prompts. Runway Gen-4.5 for filmmaking control and the best editing workflow. Kling 3.0 for ambitious, high-motion scenes. Luma when you are animating a reference image. If you only try one, make it Runway; it is the safest first choice for most people.
Read this before you pick Sora
Do not build a workflow on Sora. OpenAI discontinued the Sora web and app experiences on 26 April 2026, and the Sora API is being wound down on 24 September 2026. Whatever you may have read in an older listicle, it is no longer a buyer recommendation. That is exactly why you check the date on these guides.
Pricing, per second
| Tool | Rough cost | Best at |
|---|---|---|
| Kling 3.0 | ~$0.10/sec | High-motion action scenes |
| Veo 3.1 | from ~$0.15/sec (fast mode) | Cinematic realism, prompt following |
| Runway Gen-4.5 | Credit system | Editing workflow, brand consistency |
| Luma | Credit system | Animating still images |
For marketers specifically
Runway is the strongest pick if you are making brand content. The reference-image controls keep a character or product consistent across shots, the Gen-4 Turbo generations are fast enough to iterate, and the built-in editor means you are not stitching clips together in three other apps. Veo edges it on pure cinematic realism, so if a single hero shot has to look like film, test both.
How to choose without wasting credits
Write one detailed prompt, run it through your two shortlisted tools on their cheapest mode, and judge the output rather than the demo reel. Marketing videos: Runway. A cinematic concept: Veo 3.1. A fast, physical, chaotic scene: Kling. Bringing a photograph to life: Luma. And whatever you publish, check the evidence for any factual claim the tool put on screen, because a confident AI narrator is still just guessing.
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Did you know: the per-second gap between the cheapest and dearest tools here is roughly sevenfold, from about ten cents to seventy-five. On a one-minute cut, that is the difference between a coffee and a small weekly shop.