i2v API vs Kaiber: Image-to-Video API Comparison

A developer-first image-to-video API that turns a still photo into a 1080p MP4 clip in one HTTP call. Animate product photos, portraits, and marketing visuals programmatically — no UI, no monthly seat fees locked to a web console, no credit resets at the end of the month. $0.055 per 5-second clip on paid plans, with automatic credit refunds for any failed generation. Compare our i2v API vs Kaiber and see why engineering teams building AI video pipelines choose PixelAPI.

Why a dedicated i2v API instead of Kaiber

Kaiber is a polished consumer tool for quickly experimenting with AI video through a web interface. But when you need to animate product photos at scale inside your own application — triggered by a webhook, a content scheduler, an e-commerce upload event, or a CI/CD pipeline — you need a REST API with predictable per-call pricing, not a browser tab with subscription credits that reset monthly.

Quick start — animate a photo in one call

Sign up, upgrade to a paid plan, and POST your image with a text prompt. The endpoint returns a generation ID immediately; poll GET /v1/seedance/{id} until status=completed, then download the MP4 from output_url.

# Step 1: Submit image-to-video job
curl -X POST https://api.pixelapi.dev/v1/seedance/generate \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -F "prompt=Slow cinematic zoom, warm lighting, subtle motion" \
  -F "resolution=1080p" \
  -F "duration=5" \
  -F "camera_fixed=false" \
  -F "[email protected]"
# Response: {"generation_id":"uuid","status":"processing","estimated_seconds":120,...}

# Step 2: Poll until completed (every 5 seconds)
curl https://api.pixelapi.dev/v1/seedance/UUID \
  -H "Authorization: Bearer YOUR_API_KEY"
# Response: {"status":"completed","output_url":"https://cdn.pixelapi.dev/videos/uuid.mp4"}

pip install pixelapi
---
import time
from pixelapi import PixelAPI

client = PixelAPI(api_key="YOUR_API_KEY")

# Submit image-to-video job
job = client.video.animate(
    image="product.jpg",
    prompt="Slow cinematic zoom, warm lighting, subtle motion",
    resolution="1080p",
    duration=5,
)
print(f"Job started: {job.generation_id}")

# Poll until done (SDK handles this automatically)
result = client.video.wait(job.generation_id)
result.save("product_animated.mp4")
print(f"Video saved: product_animated.mp4")

npm install pixelapi
---
import { PixelAPI } from "pixelapi";
import { readFileSync } from "fs";

const client = new PixelAPI({ apiKey: process.env.PIXELAPI_KEY });

const result = await client.video.animate({
  image: readFileSync("product.jpg"),
  prompt: "Slow cinematic zoom, warm lighting, subtle motion",
  resolution: "1080p",
  duration: 5,
});

await result.save("product_animated.mp4");
console.log("Video saved:", result.outputUrl);

composer require pixelapi/pixelapi
---
<?php
use PixelAPI\Client;

$client = new Client(getenv("PIXELAPI_KEY"));

$job = $client->video()->animate([
    "image"      => "product.jpg",
    "prompt"     => "Slow cinematic zoom, warm lighting, subtle motion",
    "resolution" => "1080p",
    "duration"   => 5,
]);

$result = $client->video()->wait($job->generation_id);
file_put_contents("product_animated.mp4", $result->download());

gem install pixelapi
---
require "pixelapi"

client = PixelAPI::Client.new(api_key: ENV["PIXELAPI_KEY"])

job = client.video.animate(
  image:      "product.jpg",
  prompt:     "Slow cinematic zoom, warm lighting, subtle motion",
  resolution: "1080p",
  duration:   5
)

result = client.video.wait(job.generation_id)
File.binwrite("product_animated.mp4", result.download)

go get github.com/pixelapi/pixelapi-go
---
import "github.com/pixelapi/pixelapi-go"

client := pixelapi.New("YOUR_API_KEY")

job, err := client.Video.Animate(pixelapi.I2VRequest{
    Image:      "product.jpg",
    Prompt:     "Slow cinematic zoom, warm lighting, subtle motion",
    Resolution: "1080p",
    Duration:   5,
})
if err != nil { panic(err) }

result, err := client.Video.Wait(job.GenerationID)
if err != nil { panic(err) }
result.Save("product_animated.mp4")

Pricing comparison — i2v API vs Kaiber, Runway, and Pika

Pricing verified from each rival's public pricing page May 2026. Runway credits priced at $0.01/credit from the Runway developer portal; Gen-4 Turbo costs 5 credits/second and Gen-4 costs 12 credits/second. Pika and Kaiber use opaque subscription credit systems without transparent per-call API pricing — see their pricing pages for current rates. PixelAPI's per-clip price is set at exactly half the cheapest comparable i2v API rate per our pricing principle.

What you get back

Common workflows

The Image-to-Video API is the foundation for these production workflows. Each links to a setup guide:

Integrations

Plug the Image-to-Video API into the tools your team already uses:

Comparison vs alternatives

Rate limits & error handling

Default 60 requests/minute on Starter, 600 on Pro and Scale. Exceeding the limit returns HTTP 429 with a Retry-After header. Recommended: exponential backoff starting at 5s, doubling on each retry up to 60s. The Python and Node SDKs handle this automatically.

# Python SDK auto-retries 429 with backoff
from pixelapi import PixelAPI
client = PixelAPI(api_key="...", max_retries=4)

# Image-to-video — auto-retries on 429, auto-refunds on failure
job = client.video.animate(image="product.jpg", prompt="cinematic zoom")
result = client.video.wait(job.generation_id)
result.save("output.mp4")

If a video generation fails for any reason (including infrastructure-side errors), the job transitions to status=failed and your credits are automatically refunded. You can also register a notify email per job: POST /v1/seedance/{id}/notify with {"email":"[email protected]"} to receive a notification when the video is ready.

Frequently asked questions