Runway ML
This page is auto-generated from model configurations. Last updated: 2026-09-03.
This reference lists all available Runway ML video generation models and their parameters. Use these parameter names when calling the Generation API.
Runway Aleph 2
Section titled “Runway Aleph 2”Edit any video using a text prompt, with optional reference images pinned to specific moments for precise, frame-level control.
Model ID: model_runway-aleph-2
Capabilities: video2video
LLM Markdown: https://app.scenario.com/api/models/model_runway-aleph-2/markdown
| Parameter | Type | Required | Default | Min | Max | Allowed Values | Description |
|---|---|---|---|---|---|---|---|
prompt | string | Yes | - | - | - | - | Describe how you want the video to look or feel after editing — style, atmosphere, visual changes. For example: ‘transform into a noir film with high contrast and rain-soaked streets’. |
video | file | Yes | - | - | - | - | The source video to edit. Maximum 30 seconds and 16 MB. The model rewrites its visuals based on your prompt while preserving the original motion and structure. |
keyframes | inputs_array | No | - | - | - | - | Pin reference images to specific moments in the video to guide the edit at those points. Add up to 5 keyframes. Use Seconds or Position to set each one’s timing. |
promptImage | inputs_array | No | - | - | - | - | Alternative to Keyframes — pin reference images to moments in the output video. Cannot be used together with Keyframes. Add up to 5 images. |
outputFormat | string | No | mp4 | - | - | mp4, prores, png_sequence, sdr_rec709_10bit | Delivery format of the edited video. Aleph 2 has no HDR formats — convert the result with Runway Ruby instead. ProRes returns a .mov; PNG Sequence returns a .zip of frames. |
proresProfile | string | No | 422 HQ | - | - | 422 Proxy, 422 LT, 422, 422 HQ, 4444, 4444 XQ | ProRes codec profile. Only applies when Output Format is ProRes. |
seed | number | No | - | 0 | 4294967295 | - | A number that locks in the randomness of the generation. Copy the seed from a result you liked to reproduce it exactly, or leave blank for a new result each time. |
Runway Gen4 Turbo
Section titled “Runway Gen4 Turbo”The Turbo version of Gen-4 delivers further enhanced speeds at a lower cost, and is a powerful model for quickly iterating ideas.
Model ID: model_runway-gen4-turbo
Capabilities: img2video
LLM Markdown: https://app.scenario.com/api/models/model_runway-gen4-turbo/markdown
| Parameter | Type | Required | Default | Min | Max | Allowed Values | Description |
|---|---|---|---|---|---|---|---|
prompt | string | Yes | - | - | - | - | Describe your video |
image | file | Yes | - | - | - | - | Image used as the first frame of the video. |
aspectRatio | string | No | 1280:720 | - | - | 1584:672, 1280:720, 1104:832, 960:960, 832:1104, 720:1280 | Aspect ratio of the video. Ignored if first frame is provided. |
duration | number | No | 5 | 2 | 10 | - | Duration in seconds |
Runway Gen4.5
Section titled “Runway Gen4.5”Gen-4.5 is state-of-the-art and sets a new standard for video generation motion quality, prompt adherence and visual fidelity.
Model ID: model_runway-gen4-5
Capabilities: txt2video, img2video
LLM Markdown: https://app.scenario.com/api/models/model_runway-gen4-5/markdown
| Parameter | Type | Required | Default | Min | Max | Allowed Values | Description |
|---|---|---|---|---|---|---|---|
prompt | string | Yes | - | - | - | - | Describe your video |
image | file | No | - | - | - | - | Image used as the first frame of the video. |
aspectRatio | string | No | 1280:720 | - | - | 1584:672, 1280:720, 1104:832, 960:960, 832:1104, 720:1280, 672:1584 | Aspect ratio of the video. Ignored if first frame is provided. For Text to Video, only 16:9 and 9:16 are supported. |
duration | number | No | 5 | 2 | 10 | - | Duration in seconds |
outputFormat | string | No | mp4 | - | - | mp4, prores, png_sequence, hdr10, hlg, sdr_rec709_10bit, hdr_pq_12bit_master, hdr_prores, hdr_png_sequence | Delivery format of the generated video. HDR and 10-bit formats add a credit surcharge. ProRes returns a .mov; sequence formats return a .zip of frames. |
proresProfile | string | No | 422 HQ | - | - | 422 Proxy, 422 LT, 422, 422 HQ, 4444, 4444 XQ | ProRes codec profile. Only applies when Output Format is ProRes or HDR ProRes. HDR ProRes supports 422, 422 HQ, and 4444 only — not 422 Proxy, 422 LT, or 4444 XQ. |
seed | number | No | - | 0 | 4294967295 | - | Use a seed for reproducible results. Leave blank to use a random seed. |
Runway Ruby
Section titled “Runway Ruby”Convert any SDR video to HDR. Works as a post-process for videos from other models, not only Runway.
Model ID: model_runway-ruby
Capabilities: video2video
LLM Markdown: https://app.scenario.com/api/models/model_runway-ruby/markdown
| Parameter | Type | Required | Default | Min | Max | Allowed Values | Description |
|---|---|---|---|---|---|---|---|
video | file | Yes | - | - | - | - | The SDR video to convert to HDR. Maximum 40 seconds and under 4096px on each side. An HDR-tagged source is rejected by Runway. |
outputFormat | string | No | hdr10 | - | - | hdr10, hlg, hdr_prores, hdr_exr_sequence | HDR delivery format. HDR10 and HLG return an .mp4; HDR ProRes a .mov; HDR EXR Sequence a .zip of frames. |
proresProfile | string | No | 422 HQ | - | - | 422, 422 HQ, 4444 | ProRes codec profile. Only applies when Output Format is HDR ProRes. Runway defaults to 422 HQ. |