Generally available (all paid Runway consumer plans; API via Runway Dev since 2026-02-10)[1]
Runway's flagship text-to-video and image-to-video model[2], released on 2025-12-01[1] and included in every paid Runway plan[1]. On the Runway Dev API it is billed at $0.12/s[2] of output, with single clips of up to 10 s[3] and 720p-class output only[4]. Runway publishes no statement on whether Gen-4.5 generates native audio.
Pricing
| Metric | Value |
|---|---|
| API price, 720p with audio (per second) | $0.12/s (gen4.5 (Runway Dev API))[2] |
| API price, 1080p with audio (per second) | No public data |
| API price, 4K (per second) | No public data |
| API billing basis | Per second of output, flat per model: gen4.5 = 12 credits/second; credits purchased at $0.01 per credit in the developer portal (= $0.12/sec as shown on the models page); no resolution or audio price tiers for Gen-4.5[5] |
| Cheapest paid consumer plan | $15.00/mo (Standard)[6] |
| Consumer plan ladder | Free $0 (125 one-time credits); Standard $15/mo monthly or $12/mo annual, 625 credits/mo; Pro $35/mo monthly or $28/mo annual, 2250 credits/mo; Max $95/mo monthly or $76/mo annual, 9500 credits/mo (early access to new models). Gen-4.5 included in all paid plans.[6] |
| In-app cost per second | No public data |
| Free tier | Free plan: one-time deposit of 125 credits that doesn't expire; Gen-4.5 itself is only on paid plans[6] |
Output specs
| Metric | Value |
|---|---|
| Max length, single generation | 10 s (gen4.5 (Runway Dev API))[3] |
| Max length with extensions | No public data |
| Max output resolution | 720p (text-to-video)[4] |
| Frame rate | No public data |
| Aspect ratios | Text-to-video: 1280:720, 720:1280. Image-to-video: 1280:720, 1584:672, 1104:832, 720:1280, 832:1104, 672:1584, 960:960[4] |
| Max reference inputs per generation | No public data |
Features
| Metric | Value |
|---|---|
| Native audio | No public data |
| Lip-sync | No public data |
| Text-to-video | Yes[2] |
| Image-to-video | Yes[2] |
| First / last frame control | No public data |
| Multi-shot in one generation | No public data |
| Video editing | No public data |
| Video extension | No public data |
Access
| Metric | Value |
|---|---|
| Status | Generally available (all paid Runway consumer plans; API via Runway Dev since 2026-02-10)[1] |
| Public API | Yes (Runway Dev)[3] |
| Where to use it | Runway web app (app.runwayml.com), Runway iOS/Android mobile apps, Runway Dev API (docs.dev.runwayml.com)[1] |
| Regional limits | No public data |
| Release date | 2025-12-01[1] |
Public leaderboards
| Metric | Value |
|---|---|
| LMArena text-to-video score | 1225 ±8 (runway-gen-4.5)[7] |
| LMArena text-to-video rank (of 48) | #27 (runway-gen-4.5)[7] |
| LMArena image-to-video score | No public data |
| LMArena image-to-video rank (of 48) | No public data |
| VGI-Bench overall score | No public data |
Where Runway Gen-4.5 appears on this site
Kling 3.0 vs Runway Gen-4.5 · Veo 3.1 vs Runway Gen-4.5 · Alternatives guides
All head-to-head comparisons
Kling vs Veo 3 · Veo 3 vs Sora · Sora vs Kling · Seedance 2.5 vs Sora 2 · Kling 3.0 vs Seedance 2.5 · Veo 3.1 vs Seedance 2.5 · Kling 3.0 vs Runway Gen-4.5 · Veo 3.1 vs Runway Gen-4.5 · Luma Ray3.2 vs Kling 3.0 · Minimax H3 vs Kling 3.0 · Minimax H3 vs Veo 3.1 · Wan 3.0 vs Kling 3.0 · Seedance 2.5 vs Seedance 2.0 · Veo 3.1 vs Veo 3.1 Lite · PixVerse V6 vs Kling 3.0 · Vidu Q3 vs Kling 3.0
Evidence
Only official sources are cited: vendor pages, and leaderboard publishers for their own rankings. Anything we could not find on such a page is shown as “No public data”.
- Runway Research — Introducing Runway Gen-4.5 — Runway. runway.com/research/introducing-runway-gen-4.5. Checked 2026-10-07
- Runway Dev docs — Available AI Models — Runway. docs.dev.runwayml.com/guides/models. Checked 2026-10-07
- Runway Dev docs — API Changelog & Updates — Runway. docs.dev.runwayml.com/api-details/api_changelog. Checked 2026-10-07
- Runway Dev docs — API Input Parameters — Runway. docs.dev.runwayml.com/assets/inputs. Checked 2026-10-07
- Runway Dev docs — API Pricing & Costs — Runway. docs.dev.runwayml.com/guides/pricing. Checked 2026-10-07
- Runway — Pricing (consumer plans) — Runway. runway.com/pricing. Checked 2026-10-07
- Arena (arena.ai) — Text-to-Video Leaderboard — LMArena / arena.ai. arena.ai/leaderboard/text-to-video. Checked 2026-10-07