- Up to 7
Reference inputs
- Frontal plus 1 to 3
Angles per element
- 3 to 10 seconds
Clip length
- 16:9, 9:16, 1:1
Aspect ratios
About Kling O1 Reference (Character Lock)
Kling O1 Reference is Kuaishou's reference-to-video model, which Masonry runs through fal and calls Character Lock. fal describes it as turning images, elements, and text into consistent video scenes, with stable character identity, object details, and environments. Instead of describing a person or product in words and hoping it comes out right, you supply reference images and point to them in the prompt as @Element1, @Element2, @Image1, and so on.
The key idea is the element. An element is a character or object defined by a frontal image plus one to three extra angles, which gives the model a fuller view of what must stay the same. Plain reference images can add style or appearance cues. Together they can total up to seven inputs. Clips run 3 to 10 seconds in 16:9, 9:16, or 1:1. For business teams that need the same spokesperson, mascot, or product across several clips, this is the Kling route built for consistency.
Why teams choose Kling O1 Reference (Character Lock)
Choose Kling O1 Reference when identity is the brief, when the same person, mascot, or product must look the same across clips. Its element system with multiple angles per subject is built for that. For a clip that simply animates one start image, a standard image-to-video model such as Kling O3 is simpler. As with any generative video, check every clip against your references, since consistency is a strength, not a guarantee.
What Kling O1 Reference (Character Lock) can do
The capabilities that set Kling O1 Reference (Character Lock) apart and earn its place in a brief
Character and Object Elements
Define each subject as an element with a frontal image and 1 to 3 extra angles, then reference it in the prompt as @Element1, @Element2, and so on.
Up to 7 Reference Inputs
Combine elements and plain reference images, up to seven in total, to carry several characters, products, or style cues into one scene.
Stable Identity and Detail
fal describes the model as keeping character identity, object details, and environments stable across the clip.
Prompt References by Name
Point to inputs directly in the prompt with @Element and @Image tags, so it is clear which subject does what.
Clips From 3 to 10 Seconds
Choose a whole-second duration from 3 to 10 seconds, with 5 as the default.
Three Aspect Ratios
Generate in 16:9 landscape, 9:16 vertical, or 1:1 square.
Where teams reach for Kling O1 Reference (Character Lock)
- A consistent spokesperson or brand character across a series of clips
- Mascot animations that keep the same look every time
- Product clips where the exact item must stay recognizable
- Multi-character scenes with each person defined by reference
- Vertical social series featuring the same creator-style character
- Storyboards that keep characters consistent from shot to shot
Frequently asked questions
What teams need to know about creating with Kling O1 Reference (Character Lock) in Masonry
What is Kling O1 Reference (Character Lock)?
Kling O1 Reference is Kuaishou's reference-to-video model, which Masonry calls Character Lock. It builds a video around characters and objects from reference images, aiming to keep their identity and details stable.
How many reference images can Kling O1 Reference use?
Up to seven inputs in total, counting element images and plain reference images together.
What is an element in Kling O1 Reference?
An element is a character or object defined by a frontal image plus 1 to 3 extra reference angles. You refer to it in the prompt as @Element1, @Element2, and so on.
How do I reference images in the prompt?
Use @Element1, @Element2 for elements and @Image1, @Image2 for plain reference images, in the order you supplied them.
What image sizes does Kling O1 Reference accept?
fal lists element images up to 50 MB, at least 300 pixels in width and height, with an aspect ratio between 0.40 and 2.50.
How long can a Kling O1 Reference clip be?
3 to 10 seconds in whole seconds, with 5 as the default.
Which aspect ratios does Kling O1 Reference support?
16:9, 9:16, and 1:1.
Does Kling O1 Reference generate audio?
No audio option is documented for this endpoint, so plan to add sound in the edit.
How much does Kling O1 Reference cost in Masonry?
Masonry bills in credits by clip length, and the editor shows the exact cost before you generate.
Can Kling O1 Reference output be used commercially?
fal marks the endpoint for commercial use. Get consent before using a real person's likeness, and review the current fal and Kuaishou terms.
How does my team use Kling O1 Reference (Character Lock) in Masonry?
Open a Masonry canvas, pick Kling O1 Reference (Character Lock) from the model selector, and describe the video you need: a product shot, an ad creative, a social post. Masonry generates it, then you refine, edit, and combine Kling O1 Reference (Character Lock) with other models in one workspace.
Is Kling O1 Reference (Character Lock) free to try?
New Masonry accounts get 50 free credits to try GPT Image 2.5 Flare. Kling O1 Reference (Character Lock) is included in every paid plan, and the editor shows the exact credit cost before you generate.
How do I write good prompts for Kling O1 Reference (Character Lock)?
Name each subject by its tag and give it one clear action, for example "@Element1 picks up the cup". Use a clean frontal image and well-lit extra angles for each element. Keep the scene simple enough that every referenced subject has room in the frame, and describe the camera move and setting after the actions.
Who makes Kling O1 Reference (Character Lock)?
Kling O1 Reference (Character Lock) is built by Kuaishou. Inside Masonry it runs alongside 50+ image and video models, so your team can pick the right one for each brief without switching tools.
Start creating with Kling O1 Reference (Character Lock)
Generate, edit, and compare across 50+ models in one workspace.
Guides for Kling O1 Reference (Character Lock)
Prompt walkthroughs and examples from the Masonry blog
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