Seedance 2.5, Kling 3.0/4.0, Wan 2.1, Runway Gen-3 Alpha, Sora 2, and Veo 3.1 — compare prompt syntax, duration, physical simulation, and conditioning modes to engineer director-grade storyboards.
| Dimension | Seedance 2.5 | Kling 3.0/4.0 | Wan 2.1 (WanX) | Runway Gen-3 | OpenAI Sora 2 | Google Veo 3.1 |
|---|---|---|---|---|---|---|
| Vendor | ByteDance | Kuaishou | Alibaba (Open Source) | Runway | OpenAI | Google DeepMind |
| Max Duration | 10-15s blocks / 30s single-pass | 15s multi-shot (up to 2 min) | 5s-10s I2V chains | 10s (extendable) | 25s (Pro) | 60s (chained to 148s) |
| Prompt Style | 9-element formula + quality suffix | 3-tier + motion intensity (4-6) | I2V first-frame motion delta | Bracketed [Camera: ...] controls | Continuous physical simulation | 8-element optical + audio tags |
| Audio Engine | External sync pipeline | Native + character-directed voices | Community pipeline | Lip-sync tools | Native audiovisual simulation | Native multi-track + synced SFX |
| Conditioning Mode | Reference Image @character_ref | Start/End Frame + Omni ID | First Frame I2V Conditioning | Motion Brush + Keyframe | Initial reference frame | Image & Storyboard references |
| Physical Realism | Excellent (4K photorealism) | Excellent (fluids, cloth, crowds) | Top-tier open-source simulation | Cinematic film grain | Unmatched 3D simulation | Optical 35mm accuracy |
| Best For | Commercial TVCs & 30s single-pass | Multi-shot drama & character dialogue | Open-source & high-precision I2V | Director camera choreography | High-art cinematic narratives | Multi-character dialogue & sound |