Kling Motion Control: API, Pricing & Workflow (2026)

Kling Motion Control takes a short video of someone moving and maps that motion onto a still character image-one person, one performance, up to 30 seconds. The feature ships in two versions: Kling VIDEO 2.6 (body-motion focus, 5–8 credits/second) and Kling VIDEO 3.0 (facial-identity focus, 9–12 credits/second). Kling's official guide emphasizes that both versions are input-dependent, and a LinkedIn experiment found that input-image and driving-video geometry alignment is the single biggest factor in output quality.

How Kling Motion Control Works

The model extracts motion data from a motion video and applies it to a reference image, generating a clip where the character image performs the reference action. According to Kling's official user guide, the system supports one character only-if your motion reference or first frame contains multiple people, Kling selects the person occupying the largest on-screen area.

Both inputs must be a single continuous shot with no cuts, no shot changes, and minimal camera movement. Kling recommends broad motion at moderate speed with minimal displacement. Fast or complex action can cause the model to extract only a valid continuous segment, producing an output shorter than your upload-and those credits are explicitly non-refundable.

Input Requirements

The ComfyUI documentation adds a stricter minimum of 720 px for both width and height, and recommends the character image include head, shoulders, and torso fully visible.

Orientation Modes

Kling offers two orientation behaviors that control how the output frames the character:

In image-orientation mode, prompts can trigger five camera treatments: Zoom In, Zoom Out, Camera Up, Camera Down, and Fixed Position. The ComfyUI docs set a shorter maximum of 10 seconds for image-orientation mode versus 30 seconds for video-orientation mode.

Kling 3.0 vs 2.6: Features, Pricing, and Resolution Tiers

Kling positions the two versions around different strengths. 2.6 is the body-motion baseline: full-body synchronization, complex athletic action, hand articulation, 30-second one-shots, and text-prompted scene control. 3.0 layers on facial-identity improvements through a feature called Element Binding.

Element Binding lets you attach a set of facial reference images or a short facial video to the character, which the model uses to maintain identity consistency during turns, expression changes, and occlusion. The Element Library stores facial information only-it does not encode clothing, hairstyle, makeup, or props. Element Binding works only when the character orientation matches the video orientation.

Version Comparison

Pricing

Pricing is billed by generated duration in seconds, rounded to the nearest whole second (per the official guide).

A 3.4-second clip rounds down to 3 seconds (27 credits at 3.0 Standard). A 3.6-second clip rounds up to 4 seconds (36 credits). For detailed subscription-tier pricing and credit-purchase rates, see our Kling 3 API pricing guide.

Step-by-Step: Generating a Motion Control Video

1. Upload the motion video. Choose a clip from your local files or select one from Kling's built-in Motion Library. The clip must be a single continuous shot of one person, 3–30 seconds long.
2. Add the character image. Upload a still image of the character you want to animate. Match the framing: full-body image for full-body motion, half-body for half-body. Ensure limbs are visible and the subject has open space around them.
3. Bind a facial element (3.0 only). Toggle "Bind Facial Element to Enhance Facial Consistency," then either select an existing element or create one by uploading facial images or a short video.
4. Set orientation mode. Choose "Character Orientation Matches Video" for full-body choreography, or "Character Orientation Matches Image" for portrait animation with prompted camera movement.
5. Write a scene prompt (optional). In image-orientation mode, use the prompt to control background details and camera treatment.
6. Generate and iterate. Change one variable at a time-reference video, character image, or binding data. Changing all three simultaneously makes it impossible to diagnose which input caused a defect.

Element Binding Setup: How Many Angles to Prepare

For 3.0's Element Binding to work well, the official guide recommends matching your facial references to the output you want:

• Accurate head turns: one front-facing view plus left and/or right side views.
• Accurate expressions: a neutral front-facing image plus a front-facing image with the target expression (e.g., smiling).
• Seamless 360° rotation with a smile: five references-front, left profile, right profile, upward, and downward-all smiling.
• Complex emotional changes with head movement: front-facing image, smiling image, sad image, and side views.

For the richest facial data, Kling recommends uploading a short video rather than stills, because continuous footage captures more transitional expression information than discrete photos.

Using Kling Motion Control via API

The Kling web playground charges per-second credits that add up quickly. On Reddit's r/klingO1, one user testing 3.0 Motion Control observed that movement "finally starting to feel 'heavy'" and noted that feet feel anchored to the floor-an improvement over 2.6's tendency toward a sliding look (source). The same user reported that for high-volume work, the Kling 3.0 Motion Control API through third-party providers felt "noticeably cheaper" than burning through playground credits-though this is a single user's personal assessment, not a quantified pricing comparison.

Programmatic access works two ways: ComfyUI integration for visual workflows, and direct API calls for batch pipelines.

ComfyUI Integration

The ComfyUI documentation ships an official partner node that exposes all Motion Control parameters as workflow inputs:

• LoadImage node: character reference image (JPG, PNG, WEBP, GIF, AVIF; max 10 MB)
• LoadVideo node: motion reference video (MP4, MOV, WEBM, M4V, GIF; max 100 MB)
• character_orientation: video or image
• Prompt text: scene and background control
• Model tier: Standard (720p) or Pro (1080p)

A Reddit announcement in r/comfyui confirms that the ComfyUI-Kie-API node pack adds experimental support for Kling 3.0 Motion Control, exposing reference image, driving video, prompt, and orientation settings.

Direct API Access

For programmatic access outside ComfyUI, you can call Kling Motion Control through API providers that expose the underlying model. The core request includes the model version identifier, the base64 or URL-encoded character image, the motion reference video, the orientation parameter, and an optional scene prompt. The generation is asynchronous: you submit the job, poll for completion, then retrieve the video URL.

For a ready-to-use endpoint with Kling 3.0 Motion Control, you can try the Kling Motion Control model page which provides API documentation and live pricing.

Credit Cost: Calculating Per-Generation Pricing

The cost gap widens with volume. Ten five-second 3.0 Professional clips cost 600 credits versus 250 credits for 2.6 Standard for the same 50 seconds of output. Start with 2.6 Standard for drafts and reserve 3.0 Professional for final renders where facial identity matters.

Non-refundable warning: If your reference video has complex or rapid motion that causes the model to extract only a shorter valid segment, you are charged for the generated duration regardless. Kling explicitly states credits are non-refundable in this scenario.

For free-tier credit amounts that can offset testing costs, see our Kling AI free tier guide.

Common Failures and How to Fix Them

A LinkedIn experiment by César Augusto Cabrera Boggio found that input-image and driving-video camera angles, direction, and geometry must align closely for reliable tracking. Mismatches are the leading cause of warped faces and jittery motion.

FAQ

Can I use Kling Motion Control with multiple characters?

No. The feature supports one character per generation. If your reference video or first frame contains multiple people, Kling automatically selects the person who occupies the largest portion of the frame. For multi-character scenes, generate each character's clip separately and composite them in post.

Can I keep the original audio from the reference video?

Kling's official guide does not mention audio retention as a supported feature. The generated video is a fresh render based on the character image and extracted motion data. Plan to sync audio in post-production.

What's the difference between Standard and Professional mode?

Standard mode outputs at 720p and is more credit-efficient, suited for simple animation and quick tests. Professional mode outputs at 1080p at a higher per-second cost, better for detailed choreography and hand-heavy work (per the ComfyUI tier descriptions). Professional costs 33–60% more per second depending on version (33% for 3.0, 60% for 2.6).

Can I access Kling Motion Control through an API or ComfyUI?

Yes. The ComfyUI partner node exposes all Motion Control parameters as a workflow. Third-party API providers also offer programmatic access, and at least one Reddit user reported the API route felt cheaper for batch work-though this is a single personal assessment, not a verified pricing comparison.

How long can a Motion Control clip be?

Source videos can be 3–30 seconds, with output intended to match. In image-orientation mode, the ComfyUI docs cap the maximum at 10 seconds. The minimum extractable continuous motion is 3 seconds-if the model can't find 3 seconds of valid motion, generation fails.

Which Version Should You Use?

Use 2.6 for body-heavy motion, lower-cost drafts, and simple front-facing action. Use 3.0 when facial identity, expressions, occlusion recovery, or 3.0-only camera controls (Curve Dolly, Camera Shake, Multi-Elements) matter. Reference quality drives results more than prompting skill: stable, single-subject, visible, continuous, moderately paced footage.