Which AI video tool should you use?
Short answer: use Veo 3 when you need sound and dialogue, Runway when characters must stay consistent, Kling for long realistic motion, Pika for quick social clips, Luma for smooth camera moves and Sora for cinematic storytelling. Below you find the full comparison and hundreds of tested prompts for each tool.
How do the AI video tools compare?
| Tool | Best for | Clip length | Audio | Pick it if you are |
|---|---|---|---|---|
| Sora OpenAI | Cinematic storytelling | Up to ~20 s | Yes | Filmmakers and brand stories |
| Veo 3 Google | Clips with dialogue and sound | ~8 s | Native, incl. dialogue | Ads and talking scenes |
| Runway Runway | Consistent characters and control | 5–10 s | No | Editors and agencies |
| Kling Kuaishou | Long, realistic motion | Up to 2 min | Limited | Action and people in motion |
| Pika Pika Labs | Social clips and effects | 3–10 s | Sound effects | TikTok and Reels creators |
| Luma Dream Machine Luma AI | Smooth camera moves | 5–10 s | No | Travel, interiors, real estate |
Specs change quickly; check each tool's current limits before a big project.
What is Sora best at?
Sora is OpenAI's video model — short clips with surprisingly coherent motion, camera language and physics. Getting good results comes down to writing like a director: name the shot, the camera move, the lighting, and the action arc. Our Sora prompts follow that structure and stay within the durations and aspect ratios the model actually nails today.
Top tip: Open with a shot type: "Wide establishing shot of...", "Close-up tracking...".
See Sora promptsWhat is Veo 3 best at?
Veo 3 is Google's video model and the first mainstream tool that generates sound together with the picture. That changes how you write a prompt: besides the shot, camera and lighting, you describe ambience, music and even spoken lines. Our Veo 3 prompts always include a dedicated sound line, keep clips to around eight seconds, and use clear, physical descriptions so motion stays believable from the first frame to the last.
Top tip: Add a Sound line with dialogue in quotes and ambience cues.
See Veo 3 promptsWhat is Runway best at?
Runway Gen-4 is built for creators who need control. It works best when you start from a reference image and use the prompt to describe motion rather than appearance. That keeps characters, products and locations consistent across shots. Our Runway prompts focus on camera direction, subject movement and pacing, so you can build sequences that cut together cleanly in an edit.
Top tip: Start from a reference image and describe only the motion.
See Runway promptsWhat is Kling best at?
Kling is known for long clips with convincing physics: people walking, water pouring, fabric moving in the wind. It rewards prompts that describe the action step by step and the forces involved. Our Kling prompts spell out what happens at the start, the middle and the end of the clip, which keeps motion smooth and avoids the warped limbs and melting objects you see with vaguer instructions.
Top tip: Describe the action in three beats: start, middle, end.
See Kling promptsWhat is Pika best at?
Pika is the fast, fun option: short clips, eye-catching effects and easy edits of existing footage. It is popular for TikTok, Reels and memes. Prompts for Pika work best when they are short and visual, with one clear effect or transformation. Our Pika prompts are written for vertical video, open with a hook and are designed to loop, so they perform well on social feeds.
Top tip: Keep prompts short and visual.
See Pika promptsWhat is Luma Dream Machine best at?
Luma Dream Machine produces smooth, fluid motion and is especially good at sweeping camera moves through a scene. It handles start and end frames well, so you can control where a shot begins and finishes. Our Luma prompts lean into that: they describe the path the camera takes, the mood of the light and the transition between two moments, ideal for travel, real estate and brand films.
Top tip: Describe the camera path through the scene.
See Luma Dream Machine promptsFrequently asked questions
What is the best AI video tool for marketers?
For most marketers Veo 3 is the best starting point, because it creates sound and spoken lines together with the picture. That saves a separate voice-over step. If you need the same product or character across many shots, Runway is the stronger choice.
Which AI video generator makes the longest clips?
Kling makes the longest clips, up to about two minutes, with believable physics. Most other tools work best between five and ten seconds, so you combine several clips into one edit.
Can I use the same prompt in every AI video tool?
Yes, a well-structured prompt works everywhere. Describe the subject, the action, the camera move, the style, the lighting and the aspect ratio. Then add one tool-specific tweak, such as a sound line for Veo 3 or a reference image for Runway.
Which AI video tool is best for TikTok and Reels?
Pika is the quickest for vertical social clips with effects and loops. For more realistic social videos, use Veo 3 or Kling in a 9:16 aspect ratio and open with a strong visual hook.
Need a voice-over for your AI video?
Most video tools create silent clips. ElevenLabs turns your script into a natural voice in 30+ languages, ready to drop under any Sora, Runway, Kling or Pika clip.
Want an AI presenter instead of a voice-over?
HeyGen turns your script into a talking avatar that lip-syncs naturally in 175+ languages — useful for product explainers, training clips and short-form video where a real face performs better than a voice-over.
Need a talking-head video without a camera?
Synthesia writes the script, picks an AI presenter and renders a studio-quality video in minutes — no camera, no crew, no reshoots when the copy changes.
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