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6G-AI
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Runway Gen-3/Gen-4

Video Generation

by Runway ML

Leading AI video generation with Gen-3 and Gen-4 models. Text-to-video, image-to-video, and editing.

Official APIDocumentation
API Endpoint

https://api.dev.runwayml.com/v1

Documentation

Official Docs

Pricing

View Pricing

Registration & API Key Steps

1

Create Runway Account

Sign up at runwayml.com.

Open link
2

Apply for API

Visit Runway Developer Portal and apply for API access.

Open link
3

Get API Key

Once approved, generate API key from developer dashboard.

4

Purchase Credits

1 credit = $0.01. Purchase credits to generate videos.

Pricing

TierPriceFeatures
Gen-4 Standard12 credits/sec ($0.12/sec)High quality, Text & image to video, 5-10s clips
Gen-4 Turbo5 credits/sec ($0.05/sec)Faster, Lower cost, Good for iteration
Gen-3 Alpha10 credits/sec ($0.10/sec)Previous gen, Image input required, Established quality
Gen-3 Alpha Turbo5 credits/sec ($0.05/sec)7x faster, Half price, Rapid prototyping
Web Standard$15/month (750 credits)Web interface, 750 credits/month

Application Tips

Use Turbo for Iteration

Use Turbo models (5 credits/sec) to iterate, then full models for final output.

4K Upscaling

Upscale to 4K for 2 credits/sec. A 10s 4K upscale costs only $0.20.

Image-to-Video Best

Providing a reference image greatly improves video quality and coherence.

China Access Solutions

API Proxy

Use overseas proxy for Runway API.

VPN

Access web interface via VPN.

Code Example

JavaScript / TypeScript
const response = await fetch('https://api.dev.runwayml.com/v1/image_to_video', {
  method: 'POST',
  headers: {
    'Authorization': `Bearer ${process.env.RUNWAY_API_KEY}`,
    'Content-Type': 'application/json',
    'X-Runway-Version': '2024-11-06',
  },
  body: JSON.stringify({
    model: 'gen4',
    promptImage: 'https://example.com/image.jpg',
    promptText: 'Camera slowly zooms in, sunlight through clouds',
    duration: 10,
    ratio: '16:9',
  }),
});
const { id } = await response.json();
console.log('Task ID:', id);

Rate Limits

TierLimits
APIVaries by plan
Web Standard750 credits/month
Web Pro2,250 credits/month

Recommended Use Cases

Short-form videoFilm pre-visualizationMusic videosAdvertisingSocial media
Last Updated: 2025-02

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