New body-physics test for the best AI video tools:
The newly released Grok Imagine 1.5, the king Seedance 2.0, Google’s “revolutionary super-duper” Gemini Omni Flash, and the old-timer Kling 3.0 Pro.
This time I tested how each model handles realistic running motion, body movement, fabric physics, and natural secondary motion.
And the result was much less obvious than I expected.
Believe it or not, I can’t call Seedance the clear winner this time.
Each model got several attempts.
- Grok Imagine 1.5:
The new version is finally available on the official Grok website, so I could properly test it.
Honestly, I didn’t notice a massive improvement over the previous version. Still, the result was acceptable.
It produced the most cartoonish image, and the woman runs as if she’s wearing heels, but the body physics were decent enough. It also understood the instructions quickly and followed them correctly.
- Kling 3.0 Pro:
The old man decided to test my patience.
It repeatedly blocked a simple running scene as adult content, then misunderstood the instructions several times.
The successful result has the most realistic lighting and frame rate, but the actual body physics look strange. It almost feels like loose foam padding is bouncing inside the leggings.
There are also several visible artifacts and unnatural movements.
- Gemini Omni Flash:
As usual, it gave me that strange slow-motion, low-FPS look that Google models seem to love.
But it didn’t censor anything, understood the instructions immediately, and produced a beautiful, realistic result.
Surprisingly, this is the output I liked the most in this test.
- Seedance 2.0:
Seedance also blocked a couple of generations, just like Kling, but eventually produced a strong result.
It delivered the most beautiful and visually appealing footage, but I honestly expected better physics.
The video looks great, yet I can’t confidently call it the most physically accurate result.
- My ranking:
1. Gemini Omni Flash — not perfect, but the best overall result for me
2. Seedance 2.0 — visually stunning, but I preferred Omni’s physics
3. Grok Imagine 1.5 — cartoonish look and strange running, but still acceptable
4. Kling 3.0 Pro — the longest wait, the strangest physics, and the most inconsistent result
Do you agree with my ranking?
#AIVideo
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