--- description: Faster variant of ByteDance's Seedance 2.0 video model. Trades some quality for speed while sharing the same multimodal architecture. Supports text-to-video, image-to-video, native audio generation, multimodal references (images, videos, audio), video editing, and video extension. title: Seedance 2.0 Fast image: https://developers.cloudflare.com/og-docs.png --- [Skip to content](#main-content) > Documentation Index > Fetch the complete documentation index at: https://developers.cloudflare.com/llms.txt > Use this file to discover all available pages before exploring further. ![ByteDance logo](https://developers.cloudflare.com/_astro/bytedance.T1uiROQ6.svg) # Seedance 2.0 Fast Text-to-Video • ByteDance Copy as Markdown|[View as Markdown](https://developers.cloudflare.com/ai/models/bytedance/seedance-2.0-fast/index.md)|[Agent setup](https://developers.cloudflare.com/agent-setup/) `bytedance/seedance-2.0-fast` * Third-party Faster variant of ByteDance's Seedance 2.0 video model. Trades some quality for speed while sharing the same multimodal architecture. Supports text-to-video, image-to-video, native audio generation, multimodal references (images, videos, audio), video editing, and video extension. | Model Info | | | ---------------- | ----------------------------------------------------------------------------------------------------------------------------- | | More information | [link ↗](https://seed.bytedance.com/en/seedance) | | Pricing | [View pricing in the Cloudflare dashboard ↗](https://dash.cloudflare.com/?to=/:account/ai/models/bytedance/seedance-2.0-fast) | ## Usage ```ts const response = await env.AI.run( 'bytedance/seedance-2.0-fast', { prompt: 'A golden retriever running through a field of sunflowers on a sunny day', aspect_ratio: '16:9', duration: 5, resolution: '720p', }, ) console.log(response) ``` ```bash curl https://api.cloudflare.com/client/v4/accounts/$CLOUDFLARE_ACCOUNT_ID/ai/run \ --header "Authorization: Bearer $CLOUDFLARE_API_TOKEN" \ --header "Content-Type: application/json" \ --data '{ "model": "bytedance/seedance-2.0-fast", "input": { "prompt": "A golden retriever running through a field of sunflowers on a sunny day", "aspect_ratio": "16:9", "duration": 5, "resolution": "720p" } }' ``` ```json { "state": "Completed", "result": { "video": "https://examples.aig.cloudflare.com/bytedance/seedance-2.0-fast/quick-video.mp4" }, "gatewayMetadata": { "keySource": "Unified" } } ``` ## Examples **Portrait Video** — Vertical video for social media ```ts const response = await env.AI.run( 'bytedance/seedance-2.0-fast', { prompt: 'A barista pouring latte art in a cozy coffee shop, close-up with shallow depth of field', aspect_ratio: '9:16', duration: 5, resolution: '720p', }, ) console.log(response) ``` ```bash curl https://api.cloudflare.com/client/v4/accounts/$CLOUDFLARE_ACCOUNT_ID/ai/run \ --header "Authorization: Bearer $CLOUDFLARE_API_TOKEN" \ --header "Content-Type: application/json" \ --data '{ "model": "bytedance/seedance-2.0-fast", "input": { "prompt": "A barista pouring latte art in a cozy coffee shop, close-up with shallow depth of field", "aspect_ratio": "9:16", "duration": 5, "resolution": "720p" } }' ``` ```json { "state": "Completed", "result": { "video": "https://examples.aig.cloudflare.com/bytedance/seedance-2.0-fast/portrait-video.mp4" }, "gatewayMetadata": { "keySource": "Unified" } } ``` **Virtual Avatar Reference** — Use a virtual character avatar from the trusted asset library ```ts const response = await env.AI.run( 'bytedance/seedance-2.0-fast', { image: 'https://ark-doc.tos-ap-southeast-1.bytepluses.com/doc_image/r2v_tea_pic1.jpg', prompt: 'The scene gently animates with subtle motion', aspect_ratio: '16:9', duration: 5, resolution: '720p', use_virtual_avatar: true, generate_audio: false, }, ) console.log(response) ``` ```bash curl https://api.cloudflare.com/client/v4/accounts/$CLOUDFLARE_ACCOUNT_ID/ai/run \ --header "Authorization: Bearer $CLOUDFLARE_API_TOKEN" \ --header "Content-Type: application/json" \ --data '{ "model": "bytedance/seedance-2.0-fast", "input": { "image": "https://ark-doc.tos-ap-southeast-1.bytepluses.com/doc_image/r2v_tea_pic1.jpg", "prompt": "The scene gently animates with subtle motion", "aspect_ratio": "16:9", "duration": 5, "resolution": "720p", "use_virtual_avatar": true, "generate_audio": false } }' ``` ```json { "state": "Completed", "result": { "video": "https://examples.aig.cloudflare.com/bytedance/seedance-2.0-fast/virtual-avatar-reference.mp4" }, "gatewayMetadata": { "keySource": "Unified" } } ``` ## Parameters prompt `string`requiredmaxLength: 2000Text prompt describing the video to generate image `string`Reference image (HTTP(S) URL or base64 data URI) for image-to-video reference\_video `string`Reference video (HTTP(S) URL or base64 data URI) for style/motion guidance last\_frame\_image `string`Reference image (HTTP(S) URL or base64 data URI) for last-frame guidance. Only works if an image start frame is also given. ▶reference\_images\[\] `array`maxItems: 4Reference images (1-4, HTTP(S) URLs or base64 data URIs) to guide video generation for characters, avatars, clothing, or environments. Cannot be used with first/last frame images. duration `integer`requireddefault: 5minimum: 4maximum: 12Video duration in seconds resolution `string`requireddefault: 720penum: 480p, 720pVideo resolution aspect\_ratio `string`requireddefault: 16:9enum: 16:9, 4:3, 1:1, 3:4, 9:16, 21:9, 9:21Video aspect ratio. Ignored if an image is used. fps `number`requireddefault: 24const: 24Frame rate (frames per second) camera\_fixed `boolean`requireddefault: falseWhether to fix camera position generate\_audio `boolean`Whether to generate audio with the video watermark `boolean`requireddefault: falseWhether to add a watermark to the output video seed `integer`minimum: \-9007199254740991maximum: 9007199254740991Random seed for reproducible generation use\_virtual\_avatar `boolean`requireddefault: falseRoute image reference inputs (image, reference\_images, last\_frame\_image) through ByteDance's trusted virtual avatar asset library before generation. Intended for AI-generated/virtual character avatars that would otherwise be blocked by face or deepfake detection video `string`format: uriURL to the generated video ## API Schemas (Raw) Input Output Was this helpful? YesNo ## On this page [![](https://developers.cloudflare.com/_astro/logo.te5VL_aD.svg)Docs](https://developers.cloudflare.com/) ```json {"@context":"https://schema.org","@type":"TechArticle","@id":"https://developers.cloudflare.com/ai/models/bytedance/seedance-2.0-fast/#page","headline":"Seedance 2.0 Fast (ByteDance) · Cloudflare AI docs · Cloudflare AI docs","description":"Faster variant of ByteDance's Seedance 2.0 video model. Trades some quality for speed while sharing the same multimodal architecture. Supports text-to-video, image-to-video, native audio generation, multimodal references (images, videos, audio), video editing, and video extension.","url":"https://developers.cloudflare.com/ai/models/bytedance/seedance-2.0-fast/","inLanguage":"en","image":"https://developers.cloudflare.com/og-docs.png","publisher":{"@type":"Organization","name":"Cloudflare","description":"One platform for your apps, agents, and workforce. Build, secure, and scale without managing infrastructure","url":"https://www.cloudflare.com/","sameAs":["https://github.com/cloudflare","https://www.linkedin.com/company/cloudflare","https://x.com/cloudflare"],"logo":{"@type":"ImageObject","url":"https://developers.cloudflare.com/logo.svg"},"address":{"@type":"PostalAddress","streetAddress":"101 Townsend St","addressLocality":"San Francisco","addressRegion":"CA","postalCode":"94107","addressCountry":"US"},"contactPoint":[{"@type":"ContactPoint","contactType":"Customer Support","url":"https://support.cloudflare.com/","availableLanguage":["English"]},{"@type":"ContactPoint","contactType":"Sales","url":"https://www.cloudflare.com/contact/","availableLanguage":["English"]}]},"isPartOf":{"@type":"WebSite","@id":"https://developers.cloudflare.com/#website","name":"Cloudflare Docs","url":"https://developers.cloudflare.com/"}} ```