> ## Documentation Index > Fetch the complete documentation index at: https://docs.budgetpixel.com/llms.txt > Use this file to discover all available pages before exploring further. # Generate video with SeeDance 2.5 > ByteDance SeeDance 2.5 — flagship multimodal video. Text-to-video; image-to-video (start + optional end frame); and reference-to-video mixing up to 15 reference images (free), up to 5 reference video clips (2-15s each, 30s combined — billed per second of INPUT at half the output rate, see POST /v1/cost), and up to 5 reference audio clips (30s combined, free; audio-only input is supported). Video editing and extension are reference-video modes — no separate edit endpoint. Reference media can't be combined with start/end frames. 480p/720p/1080p, any duration 4-30 seconds, optional audio. **Asynchronous.** Returns a job `id` (the video is not in this response). Poll [`GET /v1/videos/{id}`](/api-reference/videos/get-video-job-status) until `status` is `succeeded` — the video URL is in that response's `video_url`. ## OpenAPI ````yaml /openapi.yaml post /videos/seedance-2.5 openapi: 3.1.0 info: contact: email: support@budgetpixel.com name: BudgetPixel Support description: > The BudgetPixel developer API for programmatic image and video generation. Generation is **asynchronous**: you create a job, then poll its status until it reaches a terminal state (`succeeded` / `failed`). You are charged in credits only on success — never for failures, timeouts, or content blocked before generation. **Authentication.** All requests require an API key sent as a bearer token: Authorization: Bearer bpx_live_xxx Create and manage keys from your BudgetPixel account dashboard. The developer API is available on the **Premium** plan and above. **Pricing.** API usage is metered in credits at each model's published price (see `GET /v1/models`), and your plan's model discounts and active promotions apply to API charges exactly as they do on the web — `POST /v1/cost` quotes your discounted price. Pro and Ultra plans include a daily free-models allowance (a shared pool of free generations per day across qualified image models such as FLUX 2 Klein and the Qwen Image series) that covers API requests too — the standard price applies once the day's pool is used. Other promotional free daily generations remain web/app-only. Failed generations are never charged. **Rate limits.** Requests are limited per minute: **600 requests/min per API key** and **1200 requests/min per source IP** (defaults; subject to tuning). Every response carries `X-RateLimit-Limit`, `X-RateLimit-Remaining`, and `X-RateLimit-Reset` (seconds until the window resets). Exceeding a limit returns HTTP `429` with a `Retry-After` header — wait that long before retrying. Rejected requests still count against the window, so a tight retry loop keeps you limited; back off instead. Generation jobs additionally have a per-plan concurrency cap (the same one as the web workshop), independent of these request limits. `POST /v1/uploads` also has a dedicated **60 uploads/min per account** cap (it's free/unmetered) on top of these limits. title: BudgetPixel API version: '2026-06-20' servers: - description: Production url: https://api.budgetpixel.com/v1 security: - ApiKeyAuth: [] tags: - description: Account and credit balance name: Account - description: Discover available models and pricing name: Models - description: Upload input media for image/video generation name: Uploads - description: Image job status name: Images - description: FLUX image models name: Black Forest Labs - description: SeeDream image models name: Bytedance - description: Video job status name: Videos - description: Kuaishou Kling video models name: Kling - description: SeeDance video models name: ByteDance (SeeDance) - description: Music job status name: Audios - description: Music generation models name: Music - description: Format conversion for images, video, and audio name: Conversions - description: Publish posts to your BudgetPixel feed name: Social - description: Content moderation — NSFW rating and CSAM detection name: Moderation - description: Content classification — music genre detection name: Classification paths: /videos/seedance-2.5: post: tags: - ByteDance (SeeDance) summary: Generate video with SeeDance 2.5 description: >- ByteDance SeeDance 2.5 — flagship multimodal video. Text-to-video; image-to-video (start + optional end frame); and reference-to-video mixing up to 15 reference images (free), up to 5 reference video clips (2-15s each, 30s combined — billed per second of INPUT at half the output rate, see POST /v1/cost), and up to 5 reference audio clips (30s combined, free; audio-only input is supported). Video editing and extension are reference-video modes — no separate edit endpoint. Reference media can't be combined with start/end frames. 480p/720p/1080p, any duration 4-30 seconds, optional audio. **Asynchronous.** Returns a job `id` (the video is not in this response). Poll [`GET /v1/videos/{id}`](/api-reference/videos/get-video-job-status) until `status` is `succeeded` — the video URL is in that response's `video_url`. operationId: createVideo_seedance_2_5 requestBody: content: application/json: schema: properties: aspect_ratio: default: '16:9' description: >- Aspect ratio for text-to-video. Ignored (adaptive) when a start frame or any reference media sets the frame. enum: - '16:9' - '9:16' - '1:1' - '4:3' - '3:4' - '21:9' type: string end_image: description: >- Optional end frame, used together with `image` (the start frame) to interpolate the video between the two frames. Same input forms as `image`. type: string generate_audio: description: Generate audio with the video (no price impact). type: boolean image: description: >- Optional start frame for image-to-video. Provide a public image URL, a data URI, raw base64, or an uploaded-file URL from POST /v1/uploads. Omit for text-to-video. Can't be combined with reference media. type: string length_seconds: default: 5 description: Output video length in seconds (4-30). maximum: 30 minimum: 4 type: integer prompt: description: Text description of the video. type: string reference_audios: description: >- Optional reference audio clips (up to 5; each 2-15s, 30s combined; WAV/MP3) that guide sound/voice. Audio-only input is supported. Each item is a public audio URL or an uploaded-file URL from POST /v1/uploads. Free — no input billing. Can't be combined with `image`/`end_image`. items: type: string maxItems: 5 type: array reference_images: description: >- Optional reference images (up to 15, free) that guide identity/style in reference-to-video mode. Each item is a public image URL, a data URI, raw base64, or an uploaded-file URL from POST /v1/uploads. Can't be combined with `image`/`end_image`. items: type: string maxItems: 15 type: array reference_videos: description: >- Optional reference video clips (up to 5; each 2-15s, 30s combined; MP4/MOV, ≤50MB each) for editing, extension, and motion/identity guidance. Each item is a public video URL or an uploaded-file URL from POST /v1/uploads (videos are passed by URL, not inlined). Billed on the INPUT duration at half the output per-second rate (80/sec at 480p, 160/sec at 720p, 375/sec at 1080p) in addition to the output — estimate via POST /v1/cost. Can't be combined with `image`/`end_image`. items: type: string maxItems: 5 type: array resolution: default: 720p description: >- Output resolution. Pricing varies by resolution — see `resolution_pricing` in GET /v1/models. enum: - 480p - 720p - 1080p type: string required: - prompt type: object required: true responses: '200': content: application/json: schema: $ref: '#/components/schemas/CreateVideoResponse' description: Job accepted. '400': $ref: '#/components/responses/BadRequest' '401': $ref: '#/components/responses/Unauthorized' '403': $ref: '#/components/responses/Forbidden' '429': $ref: '#/components/responses/TooManyRequests' components: schemas: CreateVideoResponse: properties: id: description: Opaque job id — use it to poll status. type: string message: type: string model: type: string status: $ref: '#/components/schemas/JobStatus' type: object JobStatus: description: Lifecycle state. `succeeded`/`failed`/`timeout` are terminal. enum: - pending - starting - processing - completing - succeeded - failed - timeout type: string Error: properties: error: properties: code: description: Stable machine-readable code. example: model_not_available type: string message: type: string type: description: Error category. example: invalid_request_error type: string required: - type - code - message type: object required: - error type: object responses: BadRequest: content: application/json: schema: $ref: '#/components/schemas/Error' description: The request was malformed or referenced an unavailable model. Unauthorized: content: application/json: schema: $ref: '#/components/schemas/Error' description: Missing or invalid API key. Forbidden: content: application/json: schema: $ref: '#/components/schemas/Error' description: Authenticated but not permitted (plan gate, ownership, restriction). TooManyRequests: content: application/json: schema: $ref: '#/components/schemas/Error' description: Rate or queue limit reached. Retry after a short delay. securitySchemes: ApiKeyAuth: bearerFormat: bpx_live_* description: 'API key as a bearer token: Authorization: Bearer bpx_live_xxx' scheme: bearer type: http ````