Kling O3
prospolabs/kling-o3
Kling Omni 3.0 — top-tier prompt fidelity and motion. Pick Standard (cost-effective) or Pro. Text-to-video and image-to-video (start→end interpolation) with optional native audio.
Starts from
Retail $0.168
Input
Storyboard multiple shots — overrides the single prompt above when used.
Typically completes in 30–90s.
Result
IdleOr write your own prompt and hit Generate.
01overview
What is Kling O3?
Kling O3 Pro (Kling Omni 3.0 Pro, from Kuaishou) is a top-tier video model built for prompt fidelity and motion. It handles text-to-video and image-to-video, with optional native audio you can toggle on per generation. On Prospolabs it runs from $0.134/sec audio-off versus a $0.224/sec retail rate — roughly 40% off — so a 5-second clip lands at $0.67 instead of $1.12.
Where lighter models trade detail for speed, O3 Pro is the route for hero shots, showcase reels, and image-driven sequences where you supply a starting frame and want the motion to follow it faithfully. You can generate clips from 3 to 15 seconds and set the aspect ratio in text mode. Note that O3 does not expose negative_prompt or cfg_scale, unlike Kling V3.
Prospolabs prices the API and the UI identically and bills per second of finished video in USD — no tokens, no subscription. Top up from $5, pay only for what you render, and failed runs are auto-refunded so you never pay for a generation that didn't complete.
Top-tier Kling video, about 40% off retail
Prospolabs runs Kling O3 Pro from $0.134/sec audio-off (retail $0.224) and $0.168/sec audio-on (retail $0.28) — roughly 40% off either way. That's $0.67 for a 5-second silent clip or $0.84 with native audio. No tokens, no subscription: top up from $5, pay per second in USD, and get auto-refunded on any failed run.
02capabilities
What Kling O3 can do
Text-to-video (text mode)
Describe the scene, motion, camera move, and mood, and O3 Pro renders it. In text mode you also choose the aspect_ratio to match the platform you're shipping to — landscape, vertical, or square.
Image-to-video (image mode)
Supply a starting frame and a prompt; O3 Pro animates from your image while following the described motion. Ideal for turning a product still, character render, or storyboard frame into a moving shot.
Optional native audio
Flip the generate_audio toggle to add native sound to a clip. Audio-off runs at $0.134/sec ($0.224 retail); audio-on runs at $0.168/sec ($0.28 retail). You only pay the higher rate when audio is actually on.
Flexible duration and framing
Generate anywhere from 3 to 15 seconds per request. A 5-second clip costs $0.67 audio-off or $0.84 audio-on — compute any length as per-second rate times duration.
Prompt fidelity over knobs
O3 Pro leans on strong prompt adherence rather than tuning parameters. It does not expose negative_prompt or cfg_scale; if you need those controls, Kling V3 is the model that surfaces them.
03use cases
What people build with Kling O3
Hero and showcase shots
When a clip carries the campaign — a launch teaser, a key visual, a portfolio reel — O3 Pro's detail and motion quality justify the per-second rate over a faster, lighter model.
Animating product and brand stills
Use image mode to bring an existing still to life: spin a product, push in on a render, or add subtle ambient motion while keeping your art direction intact.
Short social cuts with sound
Toggle native audio on for vertical social cuts that need to land with sound on. A 5-second audio-on clip is $0.84 on Prospolabs.
Iterating before committing
Because Prospolabs bills per second with auto-refunds on failures, you can prototype prompts on short 3-second runs, then scale the winner up to 15 seconds without subscription lock-in.
04api
Call Kling O3 from your code
The Prospolabs API for Kling O3 Pro is async: submit a job, poll until it's done, then download. The UI and API share the same USD-per-second price, and failed runs are auto-refunded.
Full Kling O3 API reference →- 01
POST to /v1/generate with model id "kling-o3", a "quality" of "standard" or "pro", and a "mode" field set to "text" (text-to-video) or "image" (image-to-video, including a starting frame).
- 02
Add your prompt plus controls: duration (3-15s), aspect_ratio (text mode), and the generate_audio toggle. The response returns a generation_id immediately.
- 03
Poll the job by generation_id until it reports complete, then read the output_url — it stays valid for 7 days, so download and store the file promptly.
- 04
If a run fails it is auto-refunded, so retry or adjust the prompt without worrying about charges for incomplete generations.
?questions
Kling O3 FAQ
Prospolabs bills per second: $0.134/sec with audio off (retail $0.224) and $0.168/sec with audio on (retail $0.28), about 40% off retail. A 5-second clip is $0.67 audio-off or $0.84 audio-on. Multiply the per-second rate by your duration for any length.
Yes. Audio is optional via the generate_audio toggle. It's priced higher when on — $0.168/sec instead of $0.134/sec on Prospolabs — so you only pay the audio rate when you actually generate sound.
O3 Pro focuses on prompt fidelity and motion quality and supports text and image modes plus optional native audio, but it does not expose negative_prompt or cfg_scale. Kling V3 surfaces those tuning controls. Both are on Prospolabs at /models/kling-v3 and /models/kling-v3.
Both. Set "mode" to "text" for text-to-video (where you also pick aspect_ratio), or "image" to animate a starting frame you supply. Duration runs 3 to 15 seconds in either mode.
Yes. Prospolabs charges the same USD-per-second rate whether you generate in the playground or via the API, so there's no surprise markup when you automate.
Failed runs are auto-refunded on Prospolabs, so you're never charged for a generation that didn't complete. The output_url for successful runs stays valid for 7 days.
No. Prospolabs is pay-as-you-go in USD with no tokens and no subscription. Top up from $5 and pay only for the seconds you render.
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