Gen-4.5 benchmarks, pricing and specs
Gen-4.5 is a Runway model with no published release date that takes text and image input and produces video. Its price is not published. It scores 1225 Elo on Arena Text-to-Video, #4 of 4 current models (Arena, measured September 22, 2026).
- Arena Text-to-Video
- 1225 Elo · #4/4
Data verified October 12, 2026 · Dataset 2026-10-12
Key facts
- Provider
- Runway
- Model family
- Runway Gen
- Release date
- Not reported
- Status
- Current
- Access
- API only
- API model id
- Not reported
- Context window
- Not reported
- Max output
- Not reported
- Input
- text, image
- Output
- video
- Task families
- video
- Declared capabilities
- text to video, image to video
Gen-4.5 pricing
Independent benchmark results
Scores come from independent evaluators that ran the model themselves, pinned to a dated snapshot. Rank is among current models in the same snapshot. Runway's own launch figures are listed under strengths with the publisher named, because they are not measured the same way.
| Benchmark | Score | Rank | Measured | Source |
|---|---|---|---|---|
| Arena Text-to-Video | 1225 Elo | #4 of 4 | September 22, 2026 | Arena · 2026-10-12 |
Strengths, cautions and best uses
Strengths
- Runway documents the exact gen4.5 identifier with text or image input and video output
Cautions
- No exact compatible public benchmark snapshot is recorded
Best for
- Runway API video generation
Alternatives to Gen-4.5
The closest current videomodels by price. The cheapest model that scores as well or better is listed first; failing that, the cheapest one within 3% of the benchmark's scale.
Gemini Omni Flash Preview
- 288 points higher on Arena Text-to-Video, 1513 vs 1225
- From Google
grok-imagine-video
- 117 points higher on Arena Text-to-Video, 1342 vs 1225
- From xAI
Veo 3.1 Preview
- 139 points higher on Arena Text-to-Video, 1364 vs 1225
- From Google
Grok Imagine Video 1.5 Lite
- From xAI
Compare Gen-4.5 with
Gen-4.5 FAQ
How does Gen-4.5 score on independent benchmarks?
Gen-4.5 scores 1225 Elo on Arena Text-to-Video, #4 of 4 current models (Arena, measured September 22, 2026). These are independent evaluations, not Runway's own launch figures.
Is Gen-4.5 open source or API only?
Gen-4.5 is available through Runway's API only; its weights are not published.
What are the best alternatives to Gen-4.5?
The closest current alternatives by price and measured performance are Gemini Omni Flash Preview (288 points higher on Arena Text-to-Video, 1513 vs 1225), grok-imagine-video (117 points higher on Arena Text-to-Video, 1342 vs 1225), Veo 3.1 Preview (139 points higher on Arena Text-to-Video, 1364 vs 1225) and Grok Imagine Video 1.5 Lite (from xAI).
Sources
- Available AI Models · Runway · official · verified August 10, 2026
- Arena leaderboard dataset (lmarena-ai/leaderboard-dataset) · Arena · independent · verified October 12, 2026 · CC-BY-4.0
Cite this page
Van Data Team. "Gen-4.5 Benchmarks, Pricing and Specs." AI Model Benchmark Dataset 2026-10-12. https://vandatateam.com/ai-model-benchmarks/gen-4-5
Reuse the data: JSON · CSV · or explore every model in the AI model benchmark comparison.
Production evaluation
Deciding whether Gen-4.5 fits your workload?
Public benchmarks narrow the shortlist. We test the finalists on your own tasks, data and cost limits, then build the routing and review controls to run the winner in production.
- Evaluation cases and acceptance thresholds tied to real work
- Model routing, fallbacks and cost controls