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Veo 3.1 Fast vs Gen-4.5
Veo 3.1 Fast edges out Gen-4.5 overall (Veo 3.1 Fast 51.0 vs Gen-4.5 40.0.) Veo 3.1 Fast looks stronger on Humans, Text, Objects and Animals, Physics. The main tradeoffs are in Animation, where Gen-4.5 tends to score better.
Veo 3.1 FastGoogle | Gen-4.5Runway |
|---|---|
Good for
| Good for
|
Bad for
| Bad for
|
Modalities
| Capability | Veo 3.1 Fast | Gen-4.5 |
|---|---|---|
| Text input | ||
| Image input | ||
| Video input | ||
| Audio input | — | — |
| Image output | ||
| Audio output | — | — |
Providers
Provider
Google
google-veo
Google is the platform that serves Veo 3.1 Fast requests, pricing, and availability.
Provider
Runway
runway-ml
Runway is the platform that serves Gen-4.5 requests, pricing, and availability.
Physics
How well the model simulates real-world physics: gravity, momentum, collisions, and natural movement.
Veo 3.1 Fast leads on physics (+8.3), with a measurable advantage over Gen-4.5. The clearest separation is on Physics (+8.3). Across the other sub-metrics in this group, the gap is smaller but generally consistent with the overall direction. If physics is a priority for your prompts, Veo 3.1 Fast is the safer pick here.
| Metric | Veo 3.1 Fast | Gen-4.5 |
|---|---|---|
| Physics | 45.7 | 37.4 |
Prompt and Logic
Measures how accurately the model follows prompts and maintains logical consistency throughout the video.
Veo 3.1 Fast leads on prompt and logic (+5.2), with a measurable advantage over Gen-4.5. The clearest separation is on Scene Consistency (+12.6). Across the other sub-metrics in this group, the gap is smaller but generally consistent with the overall direction. If prompt and logic is a priority for your prompts, Veo 3.1 Fast is the safer pick here.
| Metric | Veo 3.1 Fast | Gen-4.5 |
|---|---|---|
| Prompt Adherence | 44.0 | 47.0 |
| Logic Consistency | 41.5 | 35.6 |
| Scene Consistency | 50.7 | 38.1 |
Aesthetics
Visual quality including cinematography, artistic taste, and overall production value.
Veo 3.1 Fast leads on aesthetics (+4.8), with a measurable advantage over Gen-4.5. The clearest separation is on Cinematography (+9.4). Across the other sub-metrics in this group, the gap is smaller but generally consistent with the overall direction. If aesthetics is a priority for your prompts, Veo 3.1 Fast is the safer pick here.
| Metric | Veo 3.1 Fast | Gen-4.5 |
|---|---|---|
| Cinematography | 53.4 | 44.0 |
| Taste | — | — |
| Quality | 0.5 | 0.3 |
Animation
Performance on animated content styles including 2D, 3D, and anime-style animation.
Gen-4.5 leads on animation (+11.7), with a measurable advantage over Veo 3.1 Fast. The clearest separation is on 3D Animation (+23.5). Across the other sub-metrics in this group, the gap is smaller but generally consistent with the overall direction. If animation is a priority for your prompts, Gen-4.5 is the safer pick here.
| Metric | Veo 3.1 Fast | Gen-4.5 |
|---|---|---|
| 2D Animation | 27.7 | 41.0 |
| 3D Animation | 15.0 | 38.5 |
| Anime Animation | 54.3 | 52.5 |
Humans
Accuracy of human rendering including body proportions, hand details, and realistic actor performances.
Veo 3.1 Fast leads on humans (+23.8), with a measurable advantage over Gen-4.5. The clearest separation is on Hands (+29.3). Across the other sub-metrics in this group, the gap is smaller but generally consistent with the overall direction. If humans is a priority for your prompts, Veo 3.1 Fast is the safer pick here.
| Metric | Veo 3.1 Fast | Gen-4.5 |
|---|---|---|
| Human | 55.3 | — |
| Hands | 77.3 | 48.0 |
| Actor Performance | 56.3 | 38.0 |
Objects and Animals
Quality of rendering inanimate objects and animals with accurate shapes, textures, and movements.
Veo 3.1 Fast leads on objects and animals (+15.1), with a measurable advantage over Gen-4.5. The clearest separation is on Objects (+15.3). Across the other sub-metrics in this group, the gap is smaller but generally consistent with the overall direction. If objects and animals is a priority for your prompts, Veo 3.1 Fast is the safer pick here.
| Metric | Veo 3.1 Fast | Gen-4.5 |
|---|---|---|
| Objects | 57.6 | 42.4 |
| Animals | 55.1 | 40.2 |
Text
Ability to render readable, accurate text and typography within generated videos.
Veo 3.1 Fast leads on text (+17.2), with a measurable advantage over Gen-4.5. The clearest separation is on Text Fidelity (+17.2). Across the other sub-metrics in this group, the gap is smaller but generally consistent with the overall direction. If text is a priority for your prompts, Veo 3.1 Fast is the safer pick here.
| Metric | Veo 3.1 Fast | Gen-4.5 |
|---|---|---|
| Text Fidelity | 47.7 | 30.5 |
Cost and Speed
Practical factors including pricing per video and generation latency.
Gen-4.5 leads on cost and speed (+213.7), with a measurable advantage over Veo 3.1 Fast. The clearest separation is on Latency (+638.0). Across the other sub-metrics in this group, the gap is smaller but generally consistent with the overall direction. If cost and speed is a priority for your prompts, Gen-4.5 is the safer pick here.
| Metric | Veo 3.1 Fast | Gen-4.5 |
|---|---|---|
| Price / sec | $0.100 | $0.050 |
| Price / min | $6.00 | $3.00 |
| Latency | 638ms | 0ms |