Kling O3
Reasoning-enhanced video generation from Kuaishou. Kling O3 applies deeper understanding of complex prompts — spatial relationships, cause-and-effect, multi-step narratives — to generate up to 15 seconds of 1080p video.
What is Kling O3?
Kling O3 is Kuaishou's reasoning-enhanced video model — the "O" series denotes a class of models that incorporate extended reasoning to better interpret and execute complex, nuanced prompts before generating video output.
Where standard video models process prompts as relatively flat descriptions, Kling O3 reasons through spatial relationships, temporal sequences, causal logic, and multi-step scenarios. This means prompts like "a scientist discovers something unexpected in the lab, their expression changing from curiosity to shock" are handled with greater fidelity — the model understands the narrative arc, not just the surface description.
At up to 15 seconds and 1080p, Kling O3 has the runtime and resolution to execute on the more complex scenarios its reasoning capability is designed for. It's the model of choice when output quality depends heavily on how well the model understands your intent, not just your words.
Reasoning-enhanced
Deeper prompt understanding
Up to 15 seconds
Longer clips for complex scenes
1080p resolution
Full HD cinematic output
Nuanced output
Multi-step narrative support
How to generate video with Kling O3 on project.video
Open the composer
Access the generation composer from your project.video dashboard. Kling O3 is listed under the Kling model family in the model selector.
Select Kling O3
Choose Kling O3 for complex, reasoning-dependent prompts. For simpler, volume-based work, Kling 3.0 or 2.6 may be more efficient.
Write a detailed prompt
Kling O3 rewards detailed, nuanced prompts. Describe the scenario, the action sequence, the emotional arc, spatial relationships — the model is designed to process this complexity.
Set duration and generate
Choose up to 15 seconds to give complex scenarios the runtime they need. Set your aspect ratio and resolution, then generate.
Technical specs
Best use cases
Multi-step narrative clips
Describe a sequence of events — an action, a reaction, a change of state — and let Kling O3's reasoning capability produce a clip that follows the narrative logic rather than just the surface description.
Emotionally complex character moments
Scenes where a character's internal state needs to be visible in their expression, body language, and environment are where reasoning models excel over standard generation.
Cause-and-effect demonstrations
Explainer content, product demonstrations, and scientific visualisations often require the model to understand what causes what and how to show that visually. Kling O3 handles this more reliably.
Long-form concept videos
At 15 seconds, Kling O3 can execute a complete conceptual scenario — introduction, development, resolution — in a single generation rather than requiring multiple clips stitched together.
Example prompts
These prompts leverage Kling O3's reasoning ability — more complex scenarios that reward a reasoning model.
"A scientist in a dimly lit lab examines a glowing sample under a microscope, their expression shifts from focused concentration to wide-eyed surprise — they've discovered something unexpected. Camera slowly pushes in on their face."
"Time flows forward inside an old city bookshop: morning light enters as the shop opens, customers browse, afternoon fades to golden hour, the shopkeeper finally dims the lights at close. One continuous 15-second shot."
"A seed planted in dark soil pushes upward through the earth, unfurls its first leaf, and reaches toward light coming from the upper right corner of frame. Macro lens, slow motion, earthy tones."