Video Generation · 2026-05-07 · ModelsLab Team
Kling 3 vs Veo 3 vs Runway — AI Video API Comparison (2026)
Side-by-side test of Kling 3, Veo 3, and Runway Gen-4. Quality, prompt adherence, motion realism, and cost.
Three leading AI video models, tested on the same prompts.
Test prompt
“A red fox running through autumn leaves, golden hour, slow motion”
Results
- Kling 3 — best motion fluidity, slight color shift in skies
- Veo 3 — most photorealistic, occasional artifacting on fast motion
- Runway Gen-4 — best prompt adherence, weaker on long-form coherence
Pricing per 5-second clip
Costs vary; check each provider for current rates. Stable Diffusion API offers a unified gateway through ModelsLab for cross-provider access.