Grok Imagine Video 1.5

xai

Video

xAI's flagship Grok Imagine Video 1.5 — text or image to video with native synced audio, 1–15s clips. $0.08/sec at 480p (default), $0.14/sec at 720p, $0.25/sec at 1080p — official per-second rates, plus a flat $0.001 per generation.

Pricing

$0.08/sec

Default 8s · max 15s

Model ID

xai/grok-imagine-video-1.5

Endpoint

POST /api/v1/videos/generations

Image input:✓ supported

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="xai/grok-imagine-video-1.5",
    prompt="a red apple slowly spinning on a wooden table",
    duration_seconds=8,
    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: "xai/grok-imagine-video-1.5",
  prompt: "a red apple slowly spinning on a wooden table",
  durationSeconds: 8,
  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": "xai/grok-imagine-video-1.5",
    "prompt": "a red apple slowly spinning on a wooden table",
    "duration_seconds": 8
  }'

# 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=xai/grok-imagine-video-1.5&duration=8"

Try It — Video Generation

Type a prompt below and click Generate.

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

Duration~$0.6410 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 xAI Grok Imagine Video 1.5

Grok Imagine Video 1.5 is a video model from xAI that generates a clip from a text prompt or a reference image. A default job is 8 seconds and the longest it will render is 15 seconds; it is billed by the second of generated video. 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

Grok Imagine Video 1.5 is billed by the length of the clip it produces. A default 8-second generation costs $0.642, settlement fee included, and the maximum supported length is 15 seconds. The exact price is quoted in the 402 before you pay. 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: 8 seconds
Maximum duration: 15 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 xai/grok-imagine-video-1.5 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.