Is Sora really being discontinued?
Yes. OpenAI announced in March 2026 that the Sora web and app experiences shut down on 26 April 2026, and the Sora API will be retired on 24 September 2026. If Sora was part of your video workflow, you need a replacement now, and the three names that matter are Google Veo, Runway, and Kling.
This is not a small change. Sora was the tool that put text-to-video in front of mainstream creators, so its exit leaves a real gap.
The good news: the alternatives have matured fast. In 2026 you can type a prompt like "a slow drone pull-back from a neon Hong Kong street at 3am, light rain on the lens" and get something close to a real camera shot.
Veo, Runway or Kling: which AI video tool is best for real work?
For most teams, Runway is the best all-round choice because it is a full production suite, not just a model demo. Google Veo 3.1 wins on raw shot quality and native synced audio. Kling 3.0 wins on price and social-clip volume. Your best pick depends on whether you value production tooling, image fidelity, or cost.
Runway Gen-4.5 is built for editing-led workflows, with a full machine-learning editing suite around the generator. If you produce video regularly and need repeatable output, it is the safe default.
Veo 3.1 is widely rated the best overall generator in 2026 for shot quality and its ability to produce synchronised native audio. The catch is access, which remains limited in parts of Europe.
Kling 3.0 is the community workhorse for TikTok and Reels, favoured for natural human motion and daily free credits. It is the value option when you need many variations fast.
Which AI video tool is cheapest?
Kling 3.0 is the cheapest, starting at USD 6.99 per month for its Standard tier with a generous free credit allowance. Runway starts at USD 12 per user per month for 625 credits. Veo 3.1 is usage-priced at roughly USD 0.40 per second Standard, or USD 0.05 per second on the Lite model.
Runway's ladder is easy to plan around: Free with 125 credits, Standard at USD 12 for 625 credits a month, Pro at USD 28 for 2,250 credits, and Max at USD 76 for 9,500 credits.
For a Hong Kong freelancer testing concepts, Kling's free daily credits make it the cheapest way to iterate. For a team shipping client work, Runway's per-seat pricing is more predictable.
Veo's per-second model rewards short, deliberate clips. Because you pay by the second, a five-second shot costs a fraction of a fifteen-second one.
How do you write a good AI video prompt?
A good AI video prompt names the shot type, the subject and its action, the lighting and mood, and the camera movement, in that order. Vague prompts produce generic clips. The more you write like a cinematographer briefing a crew, the closer the result lands to what you pictured.
Here is a complete, copy-paste-ready template you can drop into Veo, Runway, or Kling:
Try This Prompt:
Cinematic medium shot. Subject: a barista in a small Hong Kong cafe steaming milk, focused expression. Action: she looks up and smiles at an off-camera customer. Lighting: warm morning light through a window, soft shadows. Camera: slow push-in from waist height, shallow depth of field. Mood: calm, welcoming. Duration: 6 seconds. Style: realistic, natural colour grade.
Two workflow tips save the most time. Fix your aspect ratio and duration before you start, because changing them restarts the whole iteration loop.
And when a clip is nearly right, reuse the same seed value where the tool exposes it. That gives you a close variation instead of a completely new result.
Which tool should you pick for your use case?
Pick Runway if you produce video weekly and need editing tools and repeatability. Pick Veo if top shot quality and built-in audio matter most and you have access. Pick Kling if you are cost-sensitive, testing many ideas, or making short social clips for TikTok and Reels.
A marketer running weekly campaign videos should default to Runway for its production stability and predictable per-seat cost.
A content creator chasing polished hero shots with sound should try Veo first, budget permitting, and confirm access from Hong Kong before committing.
A solo freelancer or student testing concepts should start on Kling, where daily free credits let you learn without spending anything.
What are the common mistakes with AI video generation?
The most common mistakes are generating clips longer than 10 seconds, changing aspect ratio mid-project, and writing prompts without camera direction. Most 2026 models hold quality and coherence best within a 5 to 15 second window, and coherence tends to degrade past 10 seconds in the majority of models.
Mistake one: asking for a 20-second single generation. Break it into shorter shots and stitch them in an editor instead.
Mistake two: switching aspect ratio after you have a good look. That resets your iteration and wastes credits. Decide 16:9 or 9:16 up front.
Mistake three: prompting the subject but not the camera. Without a shot type and movement, the model guesses, and the guess is usually flat and generic.
Try it now
Open Kling's free tier today, paste the template prompt above, and change only the subject to something from your own work. Generate one 6-second clip.
Then change the camera line, keep everything else, and generate again. Comparing those two clips will teach you more about AI video than any tutorial.
Sora leaving is not a loss, it is a prompt to upgrade your toolkit. We understand AI. We understand you better. With UD by your side, AI doesn't feel cold.
Build AI video into your real workflow
Choosing a tool is the easy part. The hard part is turning it into a repeatable process your team can run for every campaign. We'll walk you through every step, from picking the right model to designing a production workflow that fits how you already work.