Runway Model Router
Runway Model Router lets an opt-in Runway policy choose an eligible generation model for a prompt or Start Frame request. DayGen dry-runs the request before enqueueing and bills the model the router selects.
Best for
- automatic routing
- prompt video
- Start Frame
- model selection
Use when
- You prefer Runway's policy to choose the eligible generation model.
- Your request is text-only or uses one Start Frame.
- You accept that the selected model and final cost are determined by the router dry-run.
Avoid when
- You need a specific Runway model or reproducible seed control.
- You need source-video editing; use Runway Aleph 2.0.
- The deployment has not explicitly enabled the router policy.
Inputs
- prompt
- optional single Start Frame
Outputs
- MP4 video from the router-selected model
DayGen surfaces
- /video/create
- Agent video generation
Available settings
- Mode
- Text, Start Frame
- Aspect Ratio
- 16:9 (Wide), 9:16 (Story), 1:1 (Square), 4:3 (Classic), 3:4 (Portrait), 21:9 (Cinema), 9:21 (Ultra-tall portrait)
- Model
- Selected by router dry-run
- Duration
- 2–10s
- Output Format
- MP4
- Audio
- No native audio