Kling O3 API

Introduction

Kling O3 Text to video turns a written prompt into a 3-to-15-second clip with no image or reference involved. Choose a length in whole seconds, a resolution from 720p to 4K, and whether to generate native audio alongside the picture. The prompt field takes up to 2,500 characters, enough to lay out the subject, the action, the camera and, with sound on, the dialogue.

Choose a Kling O3 mode by starting material

Key features

Multi-shot cuts on its own

Set shot_type to multi and describe more than one shot in the prompt - a wide shot, a close-up, a low angle - and Kling O3 cuts between them in one clip, keeping the setting and the people consistent from one shot to the next. Our rain-soaked tango example is a single prompt describing three shots in order, and the finished clip cut to each one on cue.

Native audio in the same pass

Turn on generate_audio and dialogue, effects and ambience are generated with the picture rather than added afterward. Written dialogue in quotes comes back timed to the action: both lines in our jazz-club example matched the prompt word for word.

720p through 4K, one prompt

All three resolutions render from the same prompt, so the usual pattern is to draft at 720p until the shot and the dialogue work, then re-run the keeper at 1080p or 4K.

Request parameters

Pricing

Prices are in credits, the same credits you use on the website (1 credit = $0.01). The hold is taken when the task is accepted and settled to the actual charge when it finishes; failed tasks are refunded.

Each task is rounded up to whole credits, so one run at the lowest tier costs 51 credits for a 5-second clip ($0.51).

For an exact number before you run, send the same body to POST /jobs/quote.

Use cases

Open a scene with no image on hand

Text-to-video is the only Kling O3 mode that needs nothing but words. Use it when the shot exists only in your head, or when you need several takes fast to see which framing works before you commit an opening frame to image-to-video.

Cover a scene in multiple angles from one request

Instead of writing four separate prompts for four angles, describe the sequence once and set shot_type to multi. It is the fastest way to get a wide shot, a close-up and a reaction shot out of a single job.

Prototype dialogue timing before a longer edit

Because audio renders with the picture, a short text-to-video draft is a fast way to check whether a line of dialogue reads naturally against the action, before committing to a longer or higher-resolution run.

Prompt guide & pro tips

Number your shots when you want a cut

For a multi-shot prompt, lay the shots out in the order you want them and describe the camera for each one - wide, close-up, low angle - the way our tango example does. Kling O3 uses that structure to decide where to cut.

Name the camera position, not just the mood

"Seen from the end of the keyboard so both faces are clear" is a real instruction the model can follow; "two men on a piano bench" leaves the angle to chance, and a chance angle can hide one person behind the other. Say where the camera is relative to your subjects whenever more than one has to stay visible.

API quick start

Call the Kling O3 API in three steps

1. Create an API key. Sign in to PopNow and create a key in the API console. Keys start with sk-popnow- and use the same credits as the website.
2. Send the request. POST /jobs/createTask with model kling/o3/text-to-video and an input object that follows the parameter table. The response returns a task ID straight away.
3. Get the result. Poll GET /jobs/recordInfo with the task ID, or pass a callBackUrl and we post the result to it. Download the output links when the task succeeds.

# 1. Create the task. Keep the Idempotency-Key if you retry after a network error.
export IDEMPOTENCY_KEY="$(uuidgen)"
curl -X POST https://api.popnow.ai/api/v1/jobs/createTask \
  -H "Authorization: Bearer $POPNOW_API_KEY" \
  -H "Content-Type: application/json" \
  -H "Idempotency-Key: $IDEMPOTENCY_KEY" \
  -d '{
  "model": "kling/o3/text-to-video",
  "input": {
    "prompt": "A slow aerial shot drifting over a misty pine forest at sunrise",
    "aspect_ratio": "16:9",
    "resolution": "720p",
    "duration_seconds": 5,
    "shot_type": "single"
  }
}'

# 2. Copy data.taskId from the response, then poll until state is succeeded, failed, canceled or expired.
TASK_ID="TASK_ID_FROM_RESPONSE"
curl "https://api.popnow.ai/api/v1/jobs/recordInfo?taskId=$TASK_ID" \
  -H "Authorization: Bearer $POPNOW_API_KEY"

Replace the prompt and any links with your own. The API tab has the response, polling and callback reference.

Kling O3 API questions

All Kling models

Kling 3.0 is the pick for a single polished shot with first and last frames or Motion Control. O3 wins when you need reference photos, video editing or several modes in one place.

• Kling 3.0 API4K clips, multi-shot cuts and motion controlFrom 51 credits for a 5-second clip
• Kling O3 APIKling’s unified model: create, animate, reference and edit up to 4KFrom 51 credits for a 5-second clip
• Kling 3.0 Turbo APIFaster Kling 3.0 with sound on every clipFrom 84 credits for a 5-second clip
• Kling Avatar 2.0 APIA portrait that speaks or sings your audio, up to 5 minutesFrom 7.68 credits per second
• Kling 2.6 API1080p clips with optional sound and motion controlFrom 52 credits for a 5-second clip
• Kling 2.5 Turbo API1080p clips with a soundtrack on every takeFrom 42 credits for a 5-second clip
• Kling 2.1 Master APISilent 1080p clips with fine prompt controlFrom 162 credits for a 5-second clip
• Kling 2.1 APIAnimate a frame at 720p or 1080p, with an optional end frameFrom 27 credits for a 5-second clip

Other video APIs

• MiniMax H3 APIExpressive clips with audio, up to 2KFrom 28 credits for a 5-second clip
• Seedance 2.5 APIByteDance's newest: 30-second clips with native audioFrom 56 credits for a 5-second clip
• Vidu Q4 Preview APIUp to 4K clips with sound and spoken dialogueFrom 34 credits for a 5-second clip
• Wan 3.0 APIUp to 30-second clips with synced audioFrom 34 credits for a 5-second clip
• MiniMax H3 Max APIFast clips with ambience, effects and musicFrom 38 credits for a 5-second clip
• LTX 2.5 APILong 20-second takes up to 4K with a soundtrackFrom 68 credits for a 5-second clip

More about Kling O3

Try it

Kling O3 AI Video Generator onlineCreate videos with Kling O3 in PopNow

Compare

Kling 3.0 vs Kling O3

Docs

Kling O3 model ID and input schema in the API docsPopNow API quickstart: your first request in five minutesImage to video guide for the PopNow APIWebhooks: get Kling O3 results without polling