Kling 3 Omni is the 4K-capable variant of Kuaishou's Kling 3.0 video generation family, released in February 2026 (known on the official platform as Kling O3). It generates native 4K at 3840×2160 and up to 60fps — full-resolution rendering rather than an upscale — with clips of 3–15 seconds and synchronized, lip-synced audio. The whole 3.0 generation processes text, image, audio, and video in one model instead of chaining separate tools, so a single prompt returns a finished clip with matching sound.
The Kling 3 Omni 4K API on GPTProto routes to this model with no separate Kling subscription or developer-console plan. Need to carry a character from a source clip into new scenes? That runs on the reference-to-video task page.
| Spec | Kling 3 Omni 4K |
|---|---|
| Provider | Kuaishou (Kling AI) |
| Family | Kling 3.0 Omni (official alias: Kling O3) |
| GPTProto route | kling-v3-omni-4k |
| Modalities | text-to-video, image-to-video (reference-to-video on its task page) |
| Max resolution | native 4K, 3840×2160 |
| Frame rate | up to 60 fps |
| Clip duration | 3–15 s |
| Multi-shot | up to 6 shots per generation |
| Audio | native, lip-synced; 5 languages (English, Mandarin, Japanese, Korean, Spanish) |
| Architecture | Diffusion Transformer, MVL framework, Visual Chain-of-Thought |
| Endpoint | POST https://gptproto.com/api/v3/kling/kling-v3-omni-4k/{task} (Bearer auth) |
| Price | $1.008 per generation — 20% under the $1.26 list rate (see pricing panel) |
Kling 3 Omni 4K vs Other Video Models on GPTProto
| Capability | Kling 3 Omni 4K | Kling v3.0 (Pro) | Kling 2.6 Pro | Veo 3.1 | Sora 2 Pro¹ |
|---|---|---|---|---|---|
| Native 4K | Yes (3840×2160) | Yes | No (1080p) | Yes (3840×2160) | No (1080p) |
| Max clip length | 15 s | 15 s | ~10 s | 8 s + extension | ~25 s |
| Multi-shot in one pass | Up to 6 | Up to 6 | No | Via extension/refs | Storyboard edit |
| Native audio + lip-sync | Yes | Yes | Yes | Yes | Yes |
| On GPTProto | Yes | Yes | Yes | Yes | Yes¹ |
¹ OpenAI discontinued the official standalone Sora 2 API on 2026-03-24. Sora 2 Pro is still callable on GPTProto — one reason to route video work through one platform rather than per-vendor endpoints.
How to pick: choose Kling 3 Omni for native 4K with multi-shot direction; standard Kling v3.0 when a single-task prompt is enough; Veo 3.1 for 4K with image-reference continuity; Sora 2 Pro for longer single takes and physics-first shots.
Switching from the Official Kling Open Platform
Moving an existing Kling integration to the Kling 3 Omni 4K API is a drop-in change, not a rewrite. The async request shape stays the same — submit a task, poll for the result; three things change:
- Base URL — point requests at
https://gptproto.com/api/v3/kling/kling-v3-omni-4k/{task}, then pollhttps://gptproto.com/api/v3/predictions/{id}/result. - Auth — use your single GPTProto key (
Authorization: Bearer $GPTPROTO_API_KEY). The same key already works for every other model on your balance, so a multi-model pipeline drops one credential set. - Route — call the
kling-v3-omni-4kroute.
On the official platform, having credits is not the same as having API access — you also subscribe to a separate API plan in the developer console before the first call. Routing through GPTProto removes that step: top up one balance, generate a key, call any listed model. Working request/response code is in the Quick Start section above.
Multi-Shot at 4K
Multi-shot mode lets you describe several shots in one generation; the model returns them as one continuous 4K clip and handles the cuts internally. A common structure:
shot 1, 4s, wide establishing shot, [subject] in [setting], slow dolly in
shot 2, 5s, medium shot, [subject] [action], handheld
shot 3, 6s, close-up, [subject] [reaction], staticPer-shot prompts are capped (around 512 characters each), shot durations sum to the requested clip length, and negative prompts are accepted to exclude unwanted elements. Spatial continuity — location, character appearance, lighting — is held across cuts, which removes the generate-separately-then-stitch workflow earlier Kling versions required. Output stays at native 4K across all shots in the sequence.
Censorship & Use
The Kling 3 Omni route applies the model provider's standard content moderation. GPTProto passes requests to the official model, so the same safety checks apply — there is no separate unfiltered or NSFW build on the platform. For general developer use (advertising, product, social, narrative content) moderation rarely interferes; prompts involving real public figures, explicit content, or restricted categories may be rejected at generation time.
