video model comparison
Gen-4.5 vs grok-imagine-video
Gen-4.5 and grok-imagine-video are both current video models, from Runway and xAI. On Arena Text-to-Video, Gen-4.5 scores 1225 Elo and grok-imagine-video 1342 Elo (Arena, measured September 22, 2026).
Data verified October 12, 2026 · Dataset 2026-10-12
Side by side
Standard-tier prices in effect today. The better value in each row is highlighted.
| Fact | Gen-4.5 | grok-imagine-video |
|---|---|---|
| Price per video second | Not reported | $0.05 |
| Arena Text-to-Video | 1225 Elo (#4 of 4) | 1342 Elo (#3 of 4) (better) |
| Arena Image-to-Video | Not measured | 1415 Elo (#2 of 3) |
| Provider | Runway | xAI |
| Release date | Not reported | Not reported |
| Access | API only | API only |
| Context window | Not reported | Not reported |
| Max output | Not reported | Not reported |
| Input | text, image | text, image, video |
| Output | video | video |
Scores:Arena · 2026-10-12
When to choose each
Gen-4.5
Best for
- Runway API video generation
Watch out for
- No exact compatible public benchmark snapshot is recorded
grok-imagine-video
Best for
- Grok Imagine video generation and editing
Watch out for
- No exact compatible public benchmark snapshot is recorded
Gen-4.5 vs grok-imagine-video FAQ
Which scores higher on independent benchmarks, Gen-4.5 or grok-imagine-video?
grok-imagine-video leads on Arena Text-to-Video, 1342 Elo to 1225 Elo. Scores are independent evaluations, not either vendor's launch figures.
Related comparisons
Production evaluation
Choosing between Gen-4.5 and grok-imagine-video?
Public benchmarks narrow the shortlist. We run both on your own tasks, data and cost limits, then build the routing and review controls to run the winner in production.
- A head-to-head evaluation on your real workload
- Routing between models by cost and difficulty