When to choose Kling 4.0 and when Gemini Omni 1.1 Flash
Kling 4.0
Maximum duration: 30 s vs 10 s for Gemini Omni 1.1 Flash
Input photos: up to 8 vs up to 7 for Gemini Omni 1.1 Flash
Input videos: up to 5 vs 1, required for Gemini Omni 1.1 Flash
Input audio files: up to 3 vs No for Gemini Omni 1.1 Flash
Gemini Omni 1.1 Flash
Price, 4 s · 1080p: 48 coins vs 73 coins · Reference for Kling 4.0
Resolutions: 360p / 720p / 1080p / 4K vs 720p / 1080p for Kling 4.0
Generation modes: from text / from first and last frames / from references / video editing vs from text / from first and last frames / from references for Kling 4.0
Prompt limit: 20,000 characters vs 8,000 characters 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.
Gemini Omni 1.1 Flash: Gemini Omni 1.1 Flash combines text, references, first/last frames, and video transformation in one variant.
Specifications
Spec
Kling 4.0
Gemini Omni 1.1 Flash
Model variants
Reference / Keyframes
1.1 Flash
Generation modes
from text / from first and last frames / from references
from text / from first and last frames / from references / video editing
First frame
Yes
Yes
Last frame
Yes
Yes
Input photos
up to 8
up to 7
Input videos
up to 5
1, required
Input audio files
up to 3
No
Input video length
2–30 s
No
Minimum duration
3 s
4 s
Maximum duration
30 s
10 s
Resolutions
720p / 1080p
360p / 720p / 1080p / 4K
Aspect ratios
9:16 / 16:9 / 1:1 / auto / 21:9
9:16 / 16:9
Prompt limit
8,000 characters
20,000 characters
Price, 4 s · 1080p
73 coins · Reference
48 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 Gemini Omni 1.1 Flash
Gemini Omni 1.1 Flash combines text, references, first/last frames, and video transformation in one variant.
From text, 1–7 image references, first/last frames, or source-video transformation.
New clips: 4, 6, 8, or 10 seconds; 360p, 720p, 1080p, or 4K; 16:9 and 9:16.
The first/last-frame workflow cannot be mixed with the ordinary image-reference set.
Video transformation works on a selected segment up to 10 seconds and does not treat the new-clip duration selector as a promise for edited output length.
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.
Which is cheaper: Kling 4.0 or Gemini Omni 1.1 Flash?
Price, 4 s · 1080p: Kling 4.0 73 coins · Reference, Gemini Omni 1.1 Flash 48 coins. Gemini Omni 1.1 Flash 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 Gemini Omni 1.1 Flash?
Kling 4.0 — maximum duration: 30 s; input photos: up to 8; input videos: up to 5. Gemini Omni 1.1 Flash — price, 4 s · 1080p: 48 coins; resolutions: 360p / 720p / 1080p / 4K.
How should I compare Kling 4.0 and Gemini Omni 1.1 Flash 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.
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