Seedance 1.5 Pro

Name: ByteDance Seedance 1.5 Pro
Brand: ByteDance
Price: 0.3549 USD
Availability: InStock

bytedance

Video

ByteDance Seedance 1.5 Pro — budget text/image-to-video at 720p with synced audio (t2v), 5s default. Does NOT support RealFace assets.

Pricing

$3.108/M tokens (text)

Default 5s · max 12s

Model ID

bytedance/seedance-1.5-pro

Endpoint

POST /api/v1/videos/generations

Image input:✓ supported

Face asset:—

Payment:USDC on Base via x402

Code Examples

from blockrun_llm import LLMClient

client = LLMClient()  # uses BLOCKRUN_WALLET_KEY (never sent to server)
job = client.video_generate(
    model="bytedance/seedance-1.5-pro",
    prompt="a red apple slowly spinning on a wooden table",
    duration_seconds=5,
    image_url="https://example.com/seed.jpg",  # optional
)
print(job["data"][0]["url"])  # MP4 URL

import { LLMClient } from "@blockrun/llm";

const client = new LLMClient({ privateKey: process.env.BASE_CHAIN_WALLET_KEY! });
const job = await client.videoGenerate({
  model: "bytedance/seedance-1.5-pro",
  prompt: "a red apple slowly spinning on a wooden table",
  durationSeconds: 5,
  imageUrl: "https://example.com/seed.jpg", // optional
});
console.log(job.data[0].url); // MP4 URL

# 1. Submit (returns 402 first, sign EIP-3009 USDC TransferWithAuthorization)
curl -X POST https://blockrun.ai/api/v1/videos/generations \
  -H "Content-Type: application/json" \
  -H "x-payment: <signed-x402>" \
  -d '{
    "model": "bytedance/seedance-1.5-pro",
    "prompt": "a red apple slowly spinning on a wooden table",
    "duration_seconds": 5
  }'

# 2. The returned id is opaque — poll the response's poll_url until completed:
curl -H "x-payment: <signed-x402>" \
  "https://blockrun.ai/api/v1/videos/generations/<id>?model=bytedance/seedance-1.5-pro&duration=5"

Try It — Video Generation

Type a prompt below and click Generate.

Output: downloadable MP4. Payment in USDC via x402 — no API key.

Duration~$0.3539 USDC

Connect your wallet to generate. Pay-per-call in USDC on Base via x402 — no API key needed.

Video API docs·All models·Full pricing

About ByteDance Seedance 1.5 Pro

Seedance 1.5 Pro is a video model from ByteDance that generates a clip from a text prompt or a reference image. A default job is 5 seconds and the longest it will render is 12 seconds; it is metered on the tokens it generates, so cost rises with resolution as well as length. It is served through BlockRun's video generation API, so it can be called without an account, an API key, or a subscription.

What it costs

Seedance 1.5 Pro is metered on the tokens it generates rather than on a flat per-second rate, so cost scales with both length and resolution. A default 5-second clip at 720p comes to $0.355, settlement fee included; the same clip at a higher resolution costs proportionally more, and the maximum supported length is 12 seconds. The exact price is quoted in the 402 before you pay, so you always see the figure for the job you actually requested. Generation is asynchronous: the API returns a job you poll, and the finished MP4 is mirrored to BlockRun storage so the URL does not expire.

Specifications

Default duration: 5 seconds
Maximum duration: 12 seconds
Input modes: Text-to-video and image-to-video
Payment: Pay-per-call USDC via x402
Output hosting: Permanent MP4 hosting on BlockRun

Calling it from your code

Pass bytedance/seedance-1.5-pro as the model field to the video generation endpoint. The response contains a job id; poll it until the clip is ready.

The first request returns a 402 carrying the exact price; a signed retry runs it, and client libraries fold the two into one call — how the payment works. See the documentation for request and response shapes, the AI Video Generator page for every model on this endpoint, or browse the full catalog of 78 chat models to compare alternatives.