Runway Gen-4.5
Runway
- Released
- December 2025
- Data date
- September 26, 2026
- Predecessor
- Runway Gen-4 (Official documentation)
- Maximum resolution
- Maximum duration
- Access
- Price
- Per generated minute
What is distinctive about Runway Gen-4.5 is its controlled short-clip direction from text or an image. A single prompt can describe camera choreography, scene composition, timing, and atmospheric changes in sequence. Output ranges from 2 to 10 seconds at 720p and 24 or 25 frames per second.
Runway provides Gen-4.5 through its web app and an eligible plan.
Text-to-video and image-to-video remain separate. Their input tasks differ, so they do not receive a combined overall rank.
Methodology and source
Benchmark sources at a glance
Each evaluator measures different capabilities under its own conditions. Test series, composite indices and their components stay separate. The detailed results below retain their scales, configurations and source dates.
No active result from the reviewed external evaluators can currently be attributed to this model. Other source evidence remains available below.
Coverage is not a quality ranking. Overlapping tests and multiple settings do not count as independent experiments. Vendor claims, historical and disputed results are excluded from this overview and remain labelled in the detailed evidence.
Published benchmarks
LMArena Text to Video
Elo ratings summarize pairwise comparisons within this leaderboard. They are not percentages. The scale does not express absolute quality or linear gaps between models.
higher is betterAs of September 22, 2026Scale: 0 Elo - 1,516 Elo
Methodology and context
- Metric
- elo-rating
- Scale
- No upper bound is documented. The chart spans the recorded values and zero.
- Participants
- 22
- Sample
- 48,127
Recorded measurement details
LMArena Text to Video: LMArena Text to Video (Show measurement, test conditions, and source)
- Source value
- 1225
- Score
- 1225
- Metric
- elo-rating
- Unit
- Elo
- Task
- lmarena-text-to-video
- Task label
- LMArena Text to Video
- Direction
- Higher is better
- Source rank
- 27
- Sample
- 48127
- Lower confidence bound
- 1217
- Upper confidence bound
- 1233
- Retrieved at
- 2026-09-22
Video sample from our test
This video exists as a documented run for the exact model version. Playback is muted.
Motion and physical consistency
This sample tests Anatomy, object consistency, camera tracking, rain, and reflections.
Prompt and settings
Generate exactly one continuous five-second 16:9 cinematic video. A fictional bicycle courier in a mustard-yellow raincoat rides a red city bicycle from left to right across a rain-wet Hamburg street at blue hour for the entire clip. The camera tracks her smoothly at waist height. Both hands remain visible on the handlebars, the bicycle geometry stays physically correct, and a transparent umbrella fixed to the bicycle moves naturally in the wind. Wet-street reflections and raindrops follow realistic physics. No cuts, no slow motion, no text, no logos, no subtitles, and no audio.
Generated through OpenRouter with model runway/gen-4.5. Archived settings were 16:9, one request, first output, requested 5 s, request {"model":"runway/gen-4.5","prompt":"Generate exactly one continuous five-second 16:9 cinematic video. A fictional bicycle courier in a mustard-yellow raincoat rides a red city bicycle from left to right across a rain-wet Hamburg street at blue hour for the entire clip. The camera tracks her smoothly at waist height. Both hands remain visible on the handlebars, the bicycle geometry stays physically correct, and a transparent umbrella fixed to the bicycle moves naturally in the wind. Wet-street reflections and raindrops follow realistic physics. No cuts, no slow motion, no text, no logos, no subtitles, and no audio.","aspect_ratio":"16:9","duration":5,"resolution":"720p","generate_audio":false}, live estimated cost $0.6000, actual cost $0.6000.
Popularity
53.1 / 100
Compare this model
Show all comparisons (23)
Predecessor and successor
Sources and data date
| Type | Evidence and data date |
|---|---|
| Additional source | Runway · Runway Gen-4.5 creation guide · Editorial description reviewed October 2, 2026 |
| Additional source | Video pricing |
| Additional source | OpenRouter |
| Additional source | LMArena (retrieved September 22, 2026) |
| Additional source | OpenRouter: Popularity index (derived), CC BY 4.0 |
| Additional source | Vercel AI Gateway: Popularity index (derived), CC BY 4.0 |
| Additional source | Ollama: cumulative downloads for the popularity index |
| Additional source | Replicate: cumulative runs for the popularity index |
| Additional source | Google Trending Now: limited feed selection for Germany and the US |
| Additional source | Creative Commons Attribution 4.0 |
| Additional source | Runway: Introducing Gen-4.5 (2026-09-19) |