Kling 2.1 by Kuaishou — precise Start AND End Frame control for storyboarded video sequences. Kuaishou's natural, smooth motion quality. Image-to-video on ZenCreator.
One of only two models in the lineup with both start AND end frame anchoring. Lock the first and last image of your clip — the model fills the transition between them precisely.
🌊 Kuaishou motion quality
Kuaishou's signature smooth, natural motion. Kling 2.1 produces fluid, physics-accurate movement — great hair, fabric physics, and face tracking that feel natural even on transitions.
🎬 Narrative micro-clips
Best for short narrative beats with defined opening and closing shots. A character turning to face camera; a product reveal; a scene change between two known visual states.
🔄 Loopable sequences
With both endpoints matching, you can create seamless loops where the clip ends exactly where it began. The model handles the motion between — useful for ambient video content and GIF-style loops.
🗂️ Storyboard-accurate
If your production plan includes both a defined opening frame and a specific closing frame, Kling 2.1 respects both. More predictable for storyboarded workflows than single-endpoint models.
✅ Brand-safe content
Kling 2.1 runs with safety filters on — suitable for professional, brand-safe, and platform-compliant content where safety-filtered output is required rather than optional.
What is Kling 2.1?
Kling 2.1 is Kuaishou's earlier-generation video model on ZenCreator, notable for one capability shared by only one other model in the lineup: both start AND end frame control. Upload a source image as the start frame and a second image as the end frame, write a transition description, and the model generates the motion between the two defined visual states.
Kuaishou's motion engine — the same architecture behind Kling 2.5 and 2.6 — produces smooth, physically plausible animation. Hair physics, fabric movement, face tracking, and natural weight shifts all come from the same foundational motion model that makes the whole Kling family reliable for subject-focused video.
The key thing to know about Kling 2.1: it is the only video model on ZenCreator that operates with safety filters permanently enabled. This makes it the right choice when platform policy or brand requirements demand safety-compliant output, and also means it will not process content outside those parameters. For the same dual-endpoint capability without content restrictions, Wan 2.2 is the alternative.
See Kling 2.1 in action
Three examples using both start and end frame to define precise transitions.
You need unrestricted content — Kling 2.1 has safety filters permanently on. The only model with both start+end frame AND unrestricted output is Wan 2.2.
You want the latest Kling generation — Kling 2.5 and 2.6 use a newer architecture with better motion quality and faster generation. Kling 2.1 is retained specifically for the dual-endpoint capability.
Same scene. The woman in white stands motionless, shoulders squared, stern frown, calm breathing only. The crowd and traffic around her rush by in hyperlapse speed, motion blur and light streaks, people crossing close to camera. Camera performs a very slow push-in (about 30–40 cm) while keeping her perfectly centered and in focus; background rush remains time-lapse fast. 24fps, shutter 1/30, cinematic contrast, realistic motion blur. No jitter, no gimbal glide, natural handheld micro-drift only.
Kling 2.1's sole reason to exist in the lineup is the dual-endpoint control: when you need both a defined opening image and a defined closing image, Kling 2.1 (and Wan 2.2) are the only models that support this. Kling 2.1 adds Kuaishou's smooth, natural motion quality to that capability. If you need brand-safe content with storyboard-accurate transitions, this is the model.
Available in
Image-to-Video
Upload a start frame and end frame, write a transition prompt, pick Kling 2.1, generate.
You upload two images: one for the beginning of the clip (start frame) and one for the end (end frame). Kling 2.1 generates all the motion between them, reaching the end frame image by the last frame of the video. Most models only lock the start frame — the end frame feature is what makes Kling 2.1 distinct for storyboard work.
Kling 2.1 runs on a standard Kuaishou API endpoint without the private deployment override that enables unrestricted output on other models. It's the only video model on ZenCreator with content filtering permanently on. This makes it appropriate for brand-safe and platform-compliant content creation.
The main difference is end frame control. Kling 2.5 and 2.6 are newer generations with better motion quality and speed, but they only support start frame — not end frame anchoring. Kling 2.1 is kept in the lineup specifically for workflows that need both endpoints defined.
Yes — set the end frame to the same image as the start frame, describe a circular or returning motion, and the clip loops cleanly. You can also chain clips: set the end frame of clip A as the start frame of clip B to build longer sequences from connected 5-10 second segments.
No — Kling 2.1 generates silent video only. For clips with baked-in audio, use Kling 2.6 + Audio or Wan 2.6 + Audio. You can always add audio externally or via the Lipsync tool after generating the silent clip.
