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Kling V3 Omni API Limits: Duration, Resolution, References and Multi-Shot

Q: Does Kling V3 Omni support 4K through the API?

Yes. The APIMART endpoint lists mode: 4k alongside 720p std and 1080p pro.

Q: How many custom shots can one request contain?

The documented multi_prompt limit is six shots. Indexes must start at 1 and increase continuously.

Q: Can Kling V3 Omni generate audio while editing a video?

The documentation says audio is ignored when video_list is present. Treat these as mutually exclusive workflows.

The APIMART endpoint accepts Kling V3 Omni jobs at POST /v1/videos/generations with model: kling-v3-omni. Jobs are asynchronous: a successful submission returns a task_id for later status retrieval.

Verified request limits

| Field | Current documented boundary | |---|---| | duration | Integer from 3 through 15 seconds; default 5 | | mode | std (720p), pro (1080p), or 4k | | aspect_ratio | 16:9, 9:16, or 1:1; source-image ratio may override it | | negative_prompt | Up to 2,500 characters | | video_list | At most one reference video | | Reference video | MP4/MOV, 3–10 seconds, 720–2160px, 24–60fps, up to 200MB; output is 24fps | | multi_prompt | One to six shots; continuous indexes from 1; each duration is an integer of at least 1 second | | element_list | Up to three subjects; on-the-fly subjects use two to four images each |

Important parameter combinations

image_urls and image_with_roles are mutually exclusive.
A last-frame image without a first-frame image is invalid.
A base video edit cannot also define start/end frames.
When video_list is present, audio is ignored; do not plan simultaneous generated audio and a reference-video workflow in one request.
With custom multi-shot, the sum of shot durations must equal the top-level duration.
Image references in image_urls use <<<image_N>>> syntax. If images exist but the prompt has no explicit image reference, APIMART automatically prepends <<<image_1>>>.

Minimal valid request

{
  "model": "kling-v3-omni",
  "prompt": "A product rotates on a studio turntable",
  "mode": "std",
  "duration": 5,
  "aspect_ratio": "16:9"
}

Submit the request with a Bearer token and store the returned task_id. Treat 400, 401, 402, 429, and 500 responses as explicit failure paths; do not count submission as completed video generation.

FAQ

What is the maximum Kling V3 Omni duration on APIMART?

The current endpoint documentation accepts 3–15 seconds, with 5 seconds as the default.

Does Kling V3 Omni support 4K through the API?

Yes. The APIMART endpoint lists mode: 4k alongside 720p std and 1080p pro.

How many custom shots can one request contain?

The documented multi_prompt limit is six shots. Indexes must start at 1 and increase continuously.

Can I send an image and a reference video together?

Some combinations are supported, but boundaries apply. A feature video permits only a first-frame image, and a base video cannot be combined with start/end frames.

Can Kling V3 Omni generate audio while editing a video?

The documentation says audio is ignored when video_list is present. Treat these as mutually exclusive workflows.

Try Kling V3 Omni on APIMART

Open the attributed Kling model hub or review current APIMART pricing.

Sources and disclosure

Technical source: APIMART Kling V3 Omni endpoint documentation, checked September 2, 2026. APIMART operates the API gateway described here; implementation limits may change.

APIMART links for this guide

Machine-readable schema source

The eventual APIMART CMS page should emit the following JSON-LD objects.

[
  {
    "@context": "https://schema.org",
    "@type": "Article",
    "headline": "Kling V3 Omni API Limits: Duration, Resolution, References and Multi-Shot",
    "mainEntityOfPage": "https://apimart.ai/blog/kling-v3-omni-api-limits-duration-resolution-references",
    "dateModified": "2026-09-02",
    "author": {
      "@type": "Organization",
      "name": "APIMART"
    }
  },
  {
    "@context": "https://schema.org",
    "@type": "FAQPage",
    "mainEntity": [
      {
        "@type": "Question",
        "name": "What is the maximum Kling V3 Omni duration on APIMART?",
        "acceptedAnswer": {
          "@type": "Answer",
          "text": "The current endpoint documentation accepts 3–15 seconds, with 5 seconds as the default."
        }
      },
      {
        "@type": "Question",
        "name": "Does Kling V3 Omni support 4K through the API?",
        "acceptedAnswer": {
          "@type": "Answer",
          "text": "Yes. The APIMART endpoint lists `mode: 4k` alongside 720p `std` and 1080p `pro`."
        }
      },
      {
        "@type": "Question",
        "name": "How many custom shots can one request contain?",
        "acceptedAnswer": {
          "@type": "Answer",
          "text": "The documented `multi_prompt` limit is six shots. Indexes must start at 1 and increase continuously."
        }
      },
      {
        "@type": "Question",
        "name": "Can I send an image and a reference video together?",
        "acceptedAnswer": {
          "@type": "Answer",
          "text": "Some combinations are supported, but boundaries apply. A feature video permits only a first-frame image, and a base video cannot be combined with start/end frames."
        }
      },
      {
        "@type": "Question",
        "name": "Can Kling V3 Omni generate audio while editing a video?",
        "acceptedAnswer": {
          "@type": "Answer",
          "text": "The documentation says `audio` is ignored when `video_list` is present. Treat these as mutually exclusive workflows."
        }
      }
    ]
  }
]