--- title: RunwayML Gen-4.5 description: RunwayML's video generation model supporting both text-to-video and image-to-video with customizable duration, aspect ratio, and content moderation controls. image: https://developers.cloudflare.com/dev-products-preview.png --- > Documentation Index > Fetch the complete documentation index at: https://developers.cloudflare.com/ai/llms.txt > Use this file to discover all available pages before exploring further. [Skip to content](#%5Ftop) ![RunwayML logo](https://developers.cloudflare.com/_astro/runway.Cq8Cjov4.svg) # RunwayML Gen-4.5 Text-to-Video • RunwayML `runwayml/gen-4.5` RunwayML's video generation model supporting both text-to-video and image-to-video with customizable duration, aspect ratio, and content moderation controls. | Model Info | | | ----------------- | ------------------------------------------------------------------------------------------------------------------ | | Terms and License | [link ↗](https://runwayml.com/terms-of-use) | | More information | [link ↗](https://runwayml.com/) | | Pricing | [View pricing in the Cloudflare dashboard ↗](https://dash.cloudflare.com/?to=/:account/ai/models/runwayml/gen-4.5) | ## Usage * [ TypeScript ](#tab-panel-1892) * [ cURL ](#tab-panel-1893) TypeScript ``` const response = await env.AI.run( 'runwayml/gen-4.5', { prompt: 'A timelapse of the Eiffel Tower on a sunny day with clouds flying by', duration: 5, ratio: '1280:720', },)console.log(response) ``` Terminal window ``` curl https://api.cloudflare.com/client/v4/accounts/$CLOUDFLARE_ACCOUNT_ID/ai/run \ --header "Authorization: Bearer $CLOUDFLARE_API_TOKEN" \ --header "Content-Type: application/json" \ --data '{ "model": "runwayml/gen-4.5", "input": { "prompt": "A timelapse of the Eiffel Tower on a sunny day with clouds flying by", "duration": 5, "ratio": "1280:720" }}' ``` * [ Output ](#tab-panel-1890) * [ Raw response ](#tab-panel-1891) ``` { "gatewayMetadata": { "keySource": "Unified" }, "result": { "video": "https://dnznrvs05pmza.cloudfront.net/fd840364-360e-4903-8500-d5787fd8ab90.mp4" }, "state": "Completed"} ``` ## Examples **Portrait Video** — Vertical video for social media * [ TypeScript ](#tab-panel-1896) * [ cURL ](#tab-panel-1897) TypeScript ``` const response = await env.AI.run( 'runwayml/gen-4.5', { prompt: 'A busy street in Tokyo at night with neon signs reflecting on wet pavement, rain falling', duration: 5, ratio: '720:1280', },)console.log(response) ``` Terminal window ``` curl https://api.cloudflare.com/client/v4/accounts/$CLOUDFLARE_ACCOUNT_ID/ai/run \ --header "Authorization: Bearer $CLOUDFLARE_API_TOKEN" \ --header "Content-Type: application/json" \ --data '{ "model": "runwayml/gen-4.5", "input": { "prompt": "A busy street in Tokyo at night with neon signs reflecting on wet pavement, rain falling", "duration": 5, "ratio": "720:1280" }}' ``` * [ Output ](#tab-panel-1894) * [ Raw response ](#tab-panel-1895) ``` { "gatewayMetadata": { "keySource": "Unified" }, "result": { "video": "https://dnznrvs05pmza.cloudfront.net/44f43eac-8c12-4084-ace3-6395fa67c13e.mp4" }, "state": "Completed"} ``` **Nature Close-up** — Close-up wildlife shot in 16:9 * [ TypeScript ](#tab-panel-1900) * [ cURL ](#tab-panel-1901) TypeScript ``` const response = await env.AI.run( 'runwayml/gen-4.5', { prompt: 'Close-up of a hummingbird feeding from a vibrant red flower, slow motion with soft bokeh background', duration: 5, ratio: '1280:720', },)console.log(response) ``` Terminal window ``` curl https://api.cloudflare.com/client/v4/accounts/$CLOUDFLARE_ACCOUNT_ID/ai/run \ --header "Authorization: Bearer $CLOUDFLARE_API_TOKEN" \ --header "Content-Type: application/json" \ --data '{ "model": "runwayml/gen-4.5", "input": { "prompt": "Close-up of a hummingbird feeding from a vibrant red flower, slow motion with soft bokeh background", "duration": 5, "ratio": "1280:720" }}' ``` * [ Output ](#tab-panel-1898) * [ Raw response ](#tab-panel-1899) ``` { "gatewayMetadata": { "keySource": "Unified" }, "result": { "video": "https://dnznrvs05pmza.cloudfront.net/e03781eb-2544-45ae-a9a8-6148d556bf2a.mp4" }, "state": "Completed"} ``` **Cinematic Scene** — Longer duration cinematic video * [ TypeScript ](#tab-panel-1904) * [ cURL ](#tab-panel-1905) TypeScript ``` const response = await env.AI.run( 'runwayml/gen-4.5', { prompt: 'Aerial drone shot flying through a misty forest at dawn, rays of sunlight breaking through the trees', duration: 10, ratio: '1280:720', },)console.log(response) ``` Terminal window ``` curl https://api.cloudflare.com/client/v4/accounts/$CLOUDFLARE_ACCOUNT_ID/ai/run \ --header "Authorization: Bearer $CLOUDFLARE_API_TOKEN" \ --header "Content-Type: application/json" \ --data '{ "model": "runwayml/gen-4.5", "input": { "prompt": "Aerial drone shot flying through a misty forest at dawn, rays of sunlight breaking through the trees", "duration": 10, "ratio": "1280:720" }}' ``` * [ Output ](#tab-panel-1902) * [ Raw response ](#tab-panel-1903) ``` { "gatewayMetadata": { "keySource": "Unified" }, "result": { "video": "https://dnznrvs05pmza.cloudfront.net/23ea177e-523d-45b4-9f8c-c4f8d7238ff0.mp4" }, "state": "Completed"} ``` **Image-to-Video** — Animate an existing image * [ TypeScript ](#tab-panel-1910) * [ cURL ](#tab-panel-1911) TypeScript ``` const response = await env.AI.run( 'runwayml/gen-4.5', { prompt: 'Camera slowly pans across the scene, gentle wind blowing', duration: 5, image_input: 'https://upload.wikimedia.org/wikipedia/commons/8/85/Tour_Eiffel_Wikimedia_Commons_(cropped).jpg', ratio: '1280:720', },)console.log(response) ``` Terminal window ``` curl https://api.cloudflare.com/client/v4/accounts/$CLOUDFLARE_ACCOUNT_ID/ai/run \ --header "Authorization: Bearer $CLOUDFLARE_API_TOKEN" \ --header "Content-Type: application/json" \ --data '{ "model": "runwayml/gen-4.5", "input": { "prompt": "Camera slowly pans across the scene, gentle wind blowing", "duration": 5, "image_input": "https://upload.wikimedia.org/wikipedia/commons/8/85/Tour_Eiffel_Wikimedia_Commons_(cropped).jpg", "ratio": "1280:720" }}' ``` * [ Output ](#tab-panel-1906) * [ Raw response ](#tab-panel-1907) ``` { "gatewayMetadata": { "keySource": "Unified" }, "result": { "video": "https://dnznrvs05pmza.cloudfront.net/ab424367-7431-4a0a-aa39-52604ff9150a.mp4" }, "state": "Completed"} ``` **Reproducible Generation** — Use seed for consistent results * [ TypeScript ](#tab-panel-1914) * [ cURL ](#tab-panel-1915) TypeScript ``` const response = await env.AI.run( 'runwayml/gen-4.5', { prompt: 'A sailboat gliding across calm ocean waters at sunset', duration: 5, ratio: '1280:720', seed: 42, },)console.log(response) ``` Terminal window ``` curl https://api.cloudflare.com/client/v4/accounts/$CLOUDFLARE_ACCOUNT_ID/ai/run \ --header "Authorization: Bearer $CLOUDFLARE_API_TOKEN" \ --header "Content-Type: application/json" \ --data '{ "model": "runwayml/gen-4.5", "input": { "prompt": "A sailboat gliding across calm ocean waters at sunset", "duration": 5, "ratio": "1280:720", "seed": 42 }}' ``` * [ Output ](#tab-panel-1908) * [ Raw response ](#tab-panel-1909) ``` { "gatewayMetadata": { "keySource": "Unified" }, "result": { "video": "https://dnznrvs05pmza.cloudfront.net/0bdfbec7-0823-4529-bdb5-d37bb24adb0d.mp4" }, "state": "Completed"} ``` **With Content Moderation** — Adjust content moderation settings * [ TypeScript ](#tab-panel-1916) * [ cURL ](#tab-panel-1917) TypeScript ``` const response = await env.AI.run( 'runwayml/gen-4.5', { prompt: 'A press conference with multiple speakers at podiums', content_moderation: { public_figure_threshold: 'low' }, duration: 5, ratio: '1280:720', },)console.log(response) ``` Terminal window ``` curl https://api.cloudflare.com/client/v4/accounts/$CLOUDFLARE_ACCOUNT_ID/ai/run \ --header "Authorization: Bearer $CLOUDFLARE_API_TOKEN" \ --header "Content-Type: application/json" \ --data '{ "model": "runwayml/gen-4.5", "input": { "prompt": "A press conference with multiple speakers at podiums", "content_moderation": { "public_figure_threshold": "low" }, "duration": 5, "ratio": "1280:720" }}' ``` * [ Output ](#tab-panel-1912) * [ Raw response ](#tab-panel-1913) ``` { "gatewayMetadata": { "keySource": "Unified" }, "result": { "video": "https://dnznrvs05pmza.cloudfront.net/75c4cb0d-20aa-4824-b1f3-32f33ab9269b.mp4" }, "state": "Completed"} ``` ## Parameters * [ Input ](#tab-panel-1918) * [ Output ](#tab-panel-1919) prompt `string`requiredminLength: 1maxLength: 1000Text prompt describing what should appear in the video image\_input `string`HTTPS URL, Runway URI, or data URI containing an image for image-to-video ratio `string`requireddefault: 1280:720enum: 1280:720, 720:1280, 1104:832, 960:960, 832:1104, 1584:672Resolution/aspect ratio of the output video duration `integer`requireddefault: 5minimum: 2maximum: 10Video duration in seconds seed `integer`minimum: 0maximum: 4294967295Random seed for reproducible results ▶content\_moderation{} `object`Content moderation settings video `string`format: uriURL to the generated video ## API Schemas (Raw) Input [ ](https://developers.cloudflare.com/ai/models/runwayml/gen-4.5/schema-input.json "Open") [ ](https://developers.cloudflare.com/ai/models/runwayml/gen-4.5/schema-input.json "Download") Output [ ](https://developers.cloudflare.com/ai/models/runwayml/gen-4.5/schema-output.json "Open") [ ](https://developers.cloudflare.com/ai/models/runwayml/gen-4.5/schema-output.json "Download") 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