Top Paid AI 4K Video Generation API 

Top Paid AI Video 4K Generation API 

Here are the best paid APIs for generating AI videos in 2025, based on performance, features, and industry adoption. However, note that API keys are private and must be obtained directly from the provider (I cannot provide them here, but I’ll guide you on how to access them).

1. Synthesia API

• Best for: Studio-quality videos with AI avatars, multilingual support.

• Key Features:

  • 230+ AI avatars & 140+ language voiceovers.

  • Customizable templates, lip-sync, and enterprise integrations.

• Pricing: Starts at $30/month (custom enterprise pricing available).

• How to get API key: Sign up at Synthesia and request access.

2. Runway ML API

• Best for: Professional filmmakers & advanced editing (text-to-video, VFX).

• Key Features:

  • Frame interpolation, style transfer, and real-time rendering.

  • Supports 4K resolution and batch processing.

• Pricing: Starts at $15/month (usage-based credits).

• API Key: Register at Runway ML.

3. Tavus API

• Best for: Personalized videos at scale (marketing/sales).

• Key Features:

  • AI-generated digital twins, hyper-realistic voice cloning.

  • Dynamic video personalization for campaigns.

• Pricing: Custom (contact sales).

• Access: Apply at Tavus.

4. Kling AI API

• Best for: High-quality, cinematic videos with motion control.

• Key Features:

  • Advanced physics, 1080p resolution, and prompt accuracy.

• Pricing: $0.10–$0.50 per second of video (free tier available).

• API Key: Join waitlist at Kling AI.