SlopTV

Lip-sync test

Direct address to camera

The prompt: “A woman looking straight at camera saying clearly: "We test the slop so you do not have to."”

Mouth shapes must match specific phonemes. Easy to verify by muting and watching the lips.

Every model, same prompt

#1

Grok Video

xAI

5.00/5 best on this prompt

Exact line, phoneme-accurate sync.

#2

OpenAI Sora 2

OpenAI

5.00/5

Exact line, tight phoneme-level sync.

#3

Kling 3.0

Kuaishou

3.75/5

Lips mouth the line correctly, but NO audio was generated at all. Fidelity docked for the missing spoken component; audio dimension left unscored (see model note), not failed.

Ranked by our blind vision-model judge. Read how we test.

This page ranks by benchmark score only. See affiliate disclosure.