Veo 3.1 vs Runway Gen-4.5
Which one to choose
Pick Veo 3.1 when the clip needs generated sound, reference images for continuity, a fixed first and last frame, or extension into a longer sequence. Pick Runway Gen-4.5 for silent picture-first work, where believable physical motion and adherence to a busy prompt matter most, from photoreal to stylized animation. Veo 3.1 covers more inputs; Gen-4.5 narrows to text and image starts with strong motion.
Pricing comparison
| Veo 3.1 | Runway Gen-4.5 | |
|---|---|---|
| Model maker | Runway | |
| Delivery availability | Available | Available |
| Context window | - | - |
| Max output | - | - |
| Official price | $0.40-$0.60per second | $0.12per second |
| TokenLab price | $0.28-$0.42per second | — |
| Model performance | Collecting data | Collecting data |
| Capabilities | Image to VideoReference to VideoStart-end to videoText to VideoVideo extension | Image to VideoText to Video |
Choose Veo 3.1 when
- The scene has speech, ambience or effects you want generated with it
- You keep a character or product consistent through reference images
- You extend a clip to build a longer piece
Choose Runway Gen-4.5 when
- Falling, colliding or flowing objects must look physically plausible
- Your prompt names many elements and each must show up
- You add sound in your own editing step and only need the picture
How they differ
| Aspect | Veo 3.1 | Runway Gen-4.5 |
|---|---|---|
| Sound | Google documents audio generated together with the picture. | Silent picture only, so sound is added in a separate step. |
| Starting inputs | Text, a still image, reference images, or first and last frames. | Text or a still image. |
| Continuing a clip | Extension continues a finished clip into a longer sequence. | No extension step; each clip stands alone. |
| Motion quality | Strong on directed scenes with sound and references. | Runway names physical accuracy and motion as its main gain over Gen-4. |
| Known weak spots | Each generation stays short, and extension works only on lower-resolution clips. | Runway lists effects appearing before their cause, objects appearing or vanishing, and actions that succeed too easily. |
Summary
- Veo 3.1: $0.28-$0.42 per second; Runway Gen-4.5: $0.12 per second. Rates depend on the billing unit, specification, and usage. Compare matching conditions in the model's detailed pricing; a single rate does not determine the total cost.
FAQ
Which is better for cinematic clips, Veo 3.1 or Runway Gen-4.5?
Both aim at cinematic scenes. Choose Veo 3.1 if sound and reference control matter, and Runway Gen-4.5 if realistic physical motion and prompt adherence on busy scenes matter more than audio.
Does Runway Gen-4.5 produce audio?
No. Runway Gen-4.5 returns picture only, so dialogue and effects must be added in your editing step. Veo 3.1 generates them together with the video.
Can Gen-4.5 replace Veo 3.1 in a pipeline?
Only for text-to-video and image-to-video steps. Reference images, first-and-last-frame control and extension are Veo 3.1 features, so any pipeline step that uses them needs another approach.
Which is cheaper, Veo 3.1 or Runway Gen-4.5?
Veo 3.1: $0.28-$0.42 per second; Runway Gen-4.5: $0.12 per second. Rates depend on the billing unit, specification, and usage. Compare matching conditions in the model's detailed pricing; a single rate does not determine the total cost.
What are the key differences between Veo 3.1 and Runway Gen-4.5?
Veo 3.1: Reference to Video, Start-end to video, Video extension
Sources
Reviewed Oct 2, 2026