Quick answer
Kling capability names and availability can change by model, official surface, region, account, and plan. Verify them on Kling AI before promising lip sync, audio, duration, or 4K delivery.
Run a capability test
| Need | Test | Acceptance check |
|---|---|---|
| Lip sync | One clean single-speaker clip with approved audio | Phoneme timing, teeth and mouth artifacts, identity, language |
| Native audio | One scene with explicit speech, ambience, and exclusions | Words, speaker, noise, mix, rights, disclosure |
| 4K delivery | Download the final file | Pixel dimensions, bitrate, artifacts, native vs. upscaled path |
| Multi-shot continuity | Reuse fixed character and scene details | Identity, wardrobe, geometry, props, lighting, chronology |
Generate enough candidates to measure variance, but set a cost and review limit before starting.
Frequently asked questions
Is lip-sync quality equal across all languages?
Do not publish a language ranking without a documented matched test. Evaluate the exact language, accent, audio, framing, and speech rate.
Does “4K” mean native 4K generation?
Not necessarily. Record generation resolution, any upscaling step, and the final file properties separately.
Can generated speech be treated as factual or consented?
No. Verify the script, obtain voice and likeness permission, and disclose synthetic media where required.
What should I compare next?
Use the Luma FAQ and AI video comparison with the same acceptance rubric.
Official source
Source check: August 5, 2026. Use only the official domain and signed-in product surface.