--- title: Seedance 2.0 Fast 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. image: https://edgetunnel-b2h.pages.dev/dev-products-preview.png --- > Documentation Index > Fetch the complete documentation index at: https://edgetunnel-b2h.pages.dev/ai/llms.txt > Use this file to discover all available pages before exploring further. [Skip to content](#%5Ftop) ![ByteDance logo](https://edgetunnel-b2h.pages.dev/_astro/bytedance.T1uiROQ6.svg) # Seedance 2.0 Fast Text-to-Video • ByteDance `bytedance/seedance-2.0-fast` 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 * [ TypeScript ](#tab-panel-446) * [ cURL ](#tab-panel-447) **TypeScript** ```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 $CLOUDFLARE_API_TOKEN" \ --header "Content-Type: application/json" \ --data '{ "model": "bytedance/seedance-2.0-fast", "input": { "prompt": "A golden retriever running through a field of sunflowers on a sunny day", "aspect_ratio": "16:9", "duration": 5, "resolution": "720p" } }' ``` * [ Output ](#tab-panel-442) * [ Raw response ](#tab-panel-443) ```json { "state": "Completed", "result": { "video": "https://examples.aig.cloudflare.com/bytedance/seedance-2.0-fast/quick-video.mp4" }, "gatewayMetadata": { "keySource": "Unified" } } ``` ## Examples **Portrait Video** — Vertical video for social media * [ TypeScript ](#tab-panel-448) * [ cURL ](#tab-panel-449) **TypeScript** ```ts const response = await env.AI.run( 'bytedance/seedance-2.0-fast', { prompt: 'A barista pouring latte art in a cozy coffee shop, close-up with shallow depth of field', aspect_ratio: '9:16', duration: 5, resolution: '720p', }, ) console.log(response) ``` ```bash curl https://api.cloudflare.com/client/v4/accounts/$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" } }' ``` * [ Output ](#tab-panel-444) * [ Raw response ](#tab-panel-445) ```json { "state": "Completed", "result": { "video": "https://examples.aig.cloudflare.com/bytedance/seedance-2.0-fast/portrait-video.mp4" }, "gatewayMetadata": { "keySource": "Unified" } } ``` ## Parameters * [ Input ](#tab-panel-450) * [ Output ](#tab-panel-451) 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 video `string`format: uriURL to the generated video ## API Schemas (Raw) Input [ ](https://edgetunnel-b2h.pages.dev/ai/models/bytedance/seedance-2.0-fast/schema-input.json "Open") [ ](https://edgetunnel-b2h.pages.dev/ai/models/bytedance/seedance-2.0-fast/schema-input.json "Download") Output [ ](https://edgetunnel-b2h.pages.dev/ai/models/bytedance/seedance-2.0-fast/schema-output.json "Open") [ ](https://edgetunnel-b2h.pages.dev/ai/models/bytedance/seedance-2.0-fast/schema-output.json "Download") ```json {"@context":"https://schema.org","@type":"TechArticle","@id":"https://edgetunnel-b2h.pages.dev/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. 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