Kling 4.0 FlashvsKling 2.1

Side-by-side comparison of specs and sample outputs — no bias, no rankings.

High-speed
Cinema-quality image quality
Video Generation
AI Video Generation
Kling2.1
短尺動画
View technical specs

Technical Specifications

FeatureKling 4.0 FlashKling 2.1
Resolutions720p,1080p1080p
Aspect Ratios16:9,9:16,1:1,21:916:9,9:16,1:1
Durations3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20s5,10s
Audio✅❌
Text to Video
✅Start Generating Now
❌
Image to Video
✅Start Generating Now
✅Start Generating Now
Video to Video❌❌
Reference Images to Video
✅Start Generating Now
❌
View MoreView More

Side-by-Side Examples

Explore Other Comparisons

Other popular model comparison references

NoobAI vs GPT Image 2.5 Flare High

GPT Image 2.6 Sunburst Low vs Vega Image Lite

Hailuo 2.3 vs Kling 2.1 Master