Runway Gen-4.5
LMArena ID: runway-gen-4.5
RunwayProprietary
Runway Gen-4.5 is an AI video model from Runway. On LMArena’s Text-to-video leaderboard it ranks 27 of 48 with 1225±8 from 48,127 votes. It is not on LMArena’s Image-to-video leaderboard yet. License: Proprietary.
Key figures
- Developer
- Runway
- License
- Proprietary
- Released (per AA)
- Dec 2025
Not yet available: LMArena · Image-to-video
Who it is for (from the data)
- When quality is not the top priority: #27 of 48 on Text-to-video, in the bottom half; if quality matters most, check higher-ranked models first.
- Mainly text-to-video: no image-to-video results yet.
- Use via Runway's service or API: LMArena lists it as proprietary.
Neighbours on Text-to-video
| # | Model | Score | Votes | AA Elo | License | Δ |
|---|---|---|---|---|---|---|
| 24 |  Veo 3 Fast Google | 1248 | 15,283 | – | Proprietary | +23 |
| 25 |  Wan 2.5 T2V Preview Alibaba | 1245 | 36,378 | – | Proprietary | +20 |
| 26 | PPixVerse V5.6 PixVerse | 1240 | 32,434 | – | Proprietary | +15 |
| 27 | Runway Gen-4.5 Runway | 1225 | 48,127 | 910 | Proprietary | |
| 28 |  Kling 2.5 Turbo 1080p Kling (Kuaishou) | 1220 | 2,111 | – | Proprietary | -5 |
| 29 | Kling 2.6 Pro Kling (Kuaishou) | 1216 | 73,362 | – | Proprietary | -9 |
| 30 | PP-Video | 1207 | 7,079 | 802 | Proprietary | -18 |
Alternatives · Top open-weight models
| # | Model | Score | Votes | AA Elo | License |
|---|---|---|---|---|---|
| 8 |  MiniMax H3 MiniMax | 1460 | 11,417 | 1122 | minimax-h3-community-license-agreement |
| 37 | KKandinsky 5.0 T2V Pro Kandinsky | 1175 | 2,019 | – | MIT |
| 38 |  Hunyuan Video 1.5 Tencent | 1169 | 4,292 | – | tencent-hunyuan-community |
| 41 | LLTX 2 19B Lightricks | 1154 | 75,596 | – | ltx-2-community-license-agreement |
| 42 | Wan V2.2 A14B Alibaba | 1132 | 10,458 | – | Apache 2.0 |
How to read the scores
- LMArena score: people blind-pick the better of two anonymous videos for the same prompt, and the votes are fitted into an Elo-style rating; "±" is the 95% confidence interval.
- Text-to-video and image-to-video are separate boards, so scores are not comparable across them; AA Elo comes from Artificial Analysis on a different scale.
- If the gap between two models is smaller than their combined intervals, the order is not statistically reliable; treat them as the same tier. More votes mean narrower intervals.
FAQ
Where does Runway Gen-4.5 rank among AI video models?
Text-to-video rank 27 (1225) (LMArena, data as of Oct 26, 2026).
Is Runway Gen-4.5 open-weight?
No. LMArena lists it as Proprietary; it is available only through Runway’s products or API.
Can Runway Gen-4.5 turn an image into video?
Who makes Runway Gen-4.5?
According to LMArena, Runway Gen-4.5 is made by Runway.
How reliable is Runway Gen-4.5's score?
The scores are based on 48,127 votes on Text-to-video (95% CI ±8). More votes and narrower intervals mean a more stable rank.
How far is Runway Gen-4.5 from #1 on Text-to-video?
#1 on Text-to-video is Gemini Omni 1.1 Flash (1516); Runway Gen-4.5 scores 1225, 291 points behind.
Sources
LMArena Text-to-video data published on Sep 22, 2026.
LMArena Image-to-video data published on Sep 22, 2026.
17NAS syncs the upstream leaderboards daily; this page's data was synced on Oct 26, 2026.
Price, clip length, resolution and speed have no reliable public data yet and are omitted; all values come from the snapshot, blanks show –.