Canonical page: https://mixerai.org/en/knowledge/compare/kling-4-0-vs-grok-video/ [Mixer AI](https://mixerai.org/) › [Knowledge Base](https://mixerai.org/en/knowledge/) › [Comparison](https://mixerai.org/en/knowledge/compare/) › Kling 4.0 vs Grok Imagine Video: specs and price # Kling 4.0 vs Grok Imagine Video: specs and price Kling 4.0 — input photos: up to 8; input videos: up to 5. Grok Imagine Video — price, 1 s · 1080p: ≈ 6.38 coins; extra modes: normal / fun / spicy. Updated 2026-10-28 [Try it on Mixer AI](https://mixerai.org/?dl=kb_kling-4-0-vs-grok-video#/canvas) ## When to choose Kling 4.0 and when Grok Imagine Video ### Kling 4.0 - Input photos: up to 8 vs up to 7 for Grok Imagine Video - Input videos: up to 5 vs No for Grok Imagine Video - Input audio files: up to 3 vs No for Grok Imagine Video - Prompt limit: 8,000 characters vs 5,000 characters for Grok Imagine Video ### Grok Imagine Video - Price, 1 s · 1080p: ≈ 6.38 coins vs ≈ 18.22 coins · Reference for Kling 4.0 - Extra modes: normal / fun / spicy vs No for Kling 4.0 - Minimum duration: 1 s vs 3 s for Kling 4.0 ## Key differences Kling 4.0: A clip of up to 30 seconds from text and references or from a chain of keyframes: named characters, voice samples and exact frames. Grok Imagine Video: Animate a frame, try several ideas and build a clip lasting 6–30 seconds. ## Specifications | Spec | Kling 4.0 | Grok Imagine Video | Model variants | Reference / Keyframes | Grok Imagine Video | Generation modes | from text / from first and last frames / from references | from text / from first and last frames / from references | First frame | Yes | Yes | Last frame | Yes | Yes | Input photos | up to 8 | up to 7 | Input videos | up to 5 | No | Input audio files | up to 3 | No | Input video length | 2–30 s | No | Extra modes | No | normal / fun / spicy | Minimum duration | 3 s | 1 s | Maximum duration | 30 s | 30 s | Resolutions | 720p / 1080p | 480p / 720p / 1080p | Aspect ratios | 9:16 / 16:9 / 1:1 / auto / 21:9 | 9:16 / 16:9 / 1:1 / 2:3 / 3:2 | Prompt limit | 8,000 characters | 5,000 characters | Price, 1 s · 1080p | ≈ 18.22 coins · Reference | ≈ 6.38 coins ## What to compare visually For a fair A/B test, use the same scene and, where both modes allow it, the same first frame. Inspect motion continuity, character and object consistency, physics and contacts, camera behavior, temporal deformation, in-clip cuts and audio synchronization. ## What to inspect with Kling 4.0 A clip of up to 30 seconds from text and references or from a chain of keyframes: named characters, voice samples and exact frames. - Text and references: up to 10 reference photos and 5 videos, up to 7 characters (2–4 photos or one 3–8 second video clip each) and up to 3 voice samples. The Video sound switch applies only to reference videos. - Keyframes: a first frame, a last frame and up to 8 middle frames. The total number of frames depends on the duration and never exceeds 10. - The modes do not mix: Keyframes accepts no video, and characters and voices belong only to Text and references mode. - A hero photo must be at least 300 pixels on the short side; a video character needs at least 700 pixels and one continuous shot. ## What to inspect with Grok Imagine Video Animate a frame, try several ideas and build a clip lasting 6–30 seconds. - Text or photos, 6–30 seconds, at 480p, 720p or 1080p. - Up to 7 photos at 480p and 720p; one at 1080p. Presentation modes include Normal, Fun and Spicy. - Presentation modes do not override service restrictions or guarantee particular content. - Inspect identity, clothing and props throughout longer clips. ## How to run a fair comparison - Fix the scene, the first frame (if both models accept one), the duration and the resolution. - Judge motion, not stills: faces, hands and objects should hold across the whole clip and at cuts. - If sound matters, listen to it separately: dialogue, effects and lip sync differ between models. - Price a finished clip, not a second: the per-second rate times your real duration, rounded up once. ## Sources Prices, availability and specifications come from the Mixer AI catalog. This is not an independent test: try both models on the same task before choosing. - [Prices and availability — Mixer AI catalog](https://mixerai.org/knowledge/catalog.json) ## What we compare [ Kling 4.0 A clip of up to 30 seconds from text and references or from a chain of keyframes: named characters, voice samples and exact frames. ](https://mixerai.org/en/knowledge/video/kling-4-0/)[ Grok Imagine Video Animate a frame, try several ideas and build a clip lasting 6–30 seconds. ](https://mixerai.org/en/knowledge/video/grok-video/) ## FAQ Which is cheaper: Kling 4.0 or Grok Imagine Video? Price, 1 s · 1080p: Kling 4.0 ≈ 18.22 coins · Reference, Grok Imagine Video ≈ 6.38 coins. Grok Imagine Video is cheaper. The total depends on your settings: the price of the chosen options is shown in the interface before you run. How does Kling 4.0 differ from Grok Imagine Video? Kling 4.0 — input photos: up to 8; input videos: up to 5; input audio files: up to 3. Grok Imagine Video — price, 1 s · 1080p: ≈ 6.38 coins; extra modes: normal / fun / spicy. How should I compare Kling 4.0 and Grok Imagine Video fairly? Fix the scene, first frame, duration and resolution. Watch the motion across the whole clip and listen to the sound separately. Price the finished clip, not one second. Are both models available in Mixer AI? Yes. Both models are in the Mixer AI video catalog; the launch button on the page opens Canvas on a computer and the Studio on a phone. The page exists only for models in the current catalog. Which model is better? There is no single winner. First rule out the model that lacks the duration, first or last frame, sound or resolution you need, then compare clips on your own scene. The table highlights only measurable differences. ## See also [Kling AI Avatar vs Grok Imagine Video: specs and price→](https://mixerai.org/en/knowledge/compare/kling-avatar-vs-grok-video/)[Kling 4.0 vs HappyHorse 1.1: specs and price→](https://mixerai.org/en/knowledge/compare/kling-4-0-vs-happyhorse/)[Grok Imagine Video vs Gemini Omni 1.0 Flash: specs and price→](https://mixerai.org/en/knowledge/compare/grok-video-vs-gemini-omni-1-0-flash/)[Grok Imagine Video vs Gemini Omni 1.1 Flash: specs and price→](https://mixerai.org/en/knowledge/compare/grok-video-vs-gemini-omni-1-1-flash/) [Try it on Mixer AI](https://mixerai.org/?dl=kb_kling-4-0-vs-grok-video#/canvas)