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Video Image to Video fal.ai

Grok Imagine 1.5 I2V

Grok Imagine 1.5 I2V costs $0.852/req on FairStack · a image to video model for Animating a hero image with sound, Short social clips from existing stills, Quick motion tests before a longer render. No subscription required. Pay per generation with full REST API access. FairStack applies a transparent 20% margin on infrastructure cost so you always see the real price.

FairStack price
$0.852/req

What is Grok Imagine 1.5 I2V?

Grok Imagine Video 1.5 Image-to-Video animates a single still into a clip with audio. The output follows your input image's framing — the endpoint has no aspect ratio control — and runs from 1 to 15 seconds at 480p, 720p or 1080p. Billing is per second of output by resolution, plus a small per-image charge for the frame you supply, at the model's cost plus a flat 20% platform fee, shown before you spend. This endpoint animates from a first frame only; it has no end-frame mode, so a first-and-last-frame request is refused rather than silently ignored.

Key Features

Audio generated with the video
Output follows the input image's framing
480p, 720p and 1080p tiers
Any duration from 1 to 15 seconds

What are Grok Imagine 1.5 I2V's strengths?

Sound without a second pass
Preserves the input frame's composition
Flexible duration

What are Grok Imagine 1.5 I2V's limitations?

No aspect ratio override — the input image decides it
No end-frame (first+last) mode
Audio cannot be disabled, so it is always priced in

What is Grok Imagine 1.5 I2V best for?

Animating a hero image with sound Short social clips from existing stills Quick motion tests before a longer render

How much does Grok Imagine 1.5 I2V cost?

Metric
FairStack
Details
Price per generation
$0.852
Includes 20% margin
Subscription
None
Pay per generation only

How does Grok Imagine 1.5 I2V perform across capabilities?

Estimated from the Grok Imagine family and fal's launch description — NOT independently benchmarked. Re-score after a Visual Observatory sweep. PRD-1026.

motion quality
80%
visual quality
81%
prompt adherence
78%
temporal coherence
79%
character consistency
74%
camera control
70%
audio quality
78%

How do I use the Grok Imagine 1.5 I2V API?

curl
curl -X POST https://api.fairstack.ai/v1/generations/video \
  -H "Authorization: Bearer $FAIRSTACK_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "grok-imagine-1-5-i2v",
    "prompt": "Your prompt here"
  }'
Python
import requests

response = requests.post(
    "https://api.fairstack.ai/v1/generations/video",
    headers={
        "Authorization": f"Bearer {FAIRSTACK_API_KEY}",
        "Content-Type": "application/json",
    },
    json={
        "model": "grok-imagine-1-5-i2v",
        "prompt": "Your prompt here",
    },
)

result = response.json()
print(result["url"])
Node.js
const response = await fetch(
  "https://api.fairstack.ai/v1/generations/video",
  {
    method: "POST",
    headers: {
      Authorization: `Bearer ${process.env.FAIRSTACK_API_KEY}`,
      "Content-Type": "application/json",
    },
    body: JSON.stringify({
      model: "grok-imagine-1-5-i2v",
      prompt: "Your prompt here",
    }),
  }
);

const result = await response.json();
console.log(result.url);

What parameters does Grok Imagine 1.5 I2V support?

Parameter
Type
Default
Details
resolution
enum
720p
Options: 480p, 720p, 1080p
duration
integer
5
Range: 1–15

Frequently Asked Questions

How much does Grok Imagine 1.5 I2V cost?

Grok Imagine 1.5 I2V costs $0.852/req on FairStack as of 2026-09-24. This price includes FairStack's transparent 20% margin on infrastructure cost. No subscription or monthly fee — you pay per generation only. Minimum deposit is $1.

What is Grok Imagine 1.5 I2V and what is it best for?

Grok Imagine Video 1.5 Image-to-Video animates a single still into a clip with audio. The output follows your input image's framing — the endpoint has no aspect ratio control — and runs from 1 to 15 seconds at 480p, 720p or 1080p. Billing is per second of output by resolution, plus a small per-image charge for the frame you supply, at the model's cost plus a flat 20% platform fee, shown before you spend. This endpoint animates from a first frame only; it has no end-frame mode, so a first-and-last-frame request is refused rather than silently ignored. Grok Imagine 1.5 I2V is best for Animating a hero image with sound, Short social clips from existing stills, Quick motion tests before a longer render. Available via FairStack's REST API with curl, Python, and Node.js SDKs.

Does Grok Imagine 1.5 I2V have an API?

Yes. Grok Imagine 1.5 I2V is available via FairStack's REST API at api.fairstack.ai. Send a POST request to /v1/generations/video with your API key and prompt. Works with curl, Python requests, Node.js fetch, and any HTTP client. No SDK installation required.

How does Grok Imagine 1.5 I2V compare to other video models?

Grok Imagine 1.5 I2V excels at Animating a hero image with sound, Short social clips from existing stills, Quick motion tests before a longer render. It is a image to video model priced at $0.852/req on FairStack. Key strengths: Sound without a second pass, Preserves the input frame's composition. Compare all video models at fairstack.ai/models.

Start using Grok Imagine 1.5 I2V today

$0.852/req. Full API access. No subscription.

Start Creating