How to Access Sora 2, Veo 3, and Runway Gen-4 with One API Key

#ai #python #api #videogeneration

Managing multiple AI video generation API keys is a nightmare.

Sora 2 requires an OpenAI account. Veo 3 needs Google Cloud credentials. Runway Gen-4 has its own billing. Kling AI is yet another subscription.

What if you could access all of them with one API key?

That's exactly what NexaAPI does — a unified inference API that routes to 50+ models including all major video generation models, available on RapidAPI.

The Problem: API Key Sprawl

Here's what managing AI video generation looks like without NexaAPI:

# Without NexaAPI — 4 different SDKs, 4 billing accounts
from openai import OpenAI          # Sora 2
import google.generativeai as genai  # Veo 3
import runwayml                      # Runway Gen-4
import kling_ai                      # Kling AI

openai_client = OpenAI(api_key='sk-...')
genai.configure(api_key='AIza...')
runway_client = runwayml.RunwayML(api_key='key_...')
kling_client = kling_ai.Client(api_key='kling_...')

Four SDKs. Four billing accounts. Four rate limit systems to manage.

The Solution: One API Key

# With NexaAPI — one SDK, one key, all models
# pip install nexaapi  →  https://pypi.org/project/nexaapi/
from nexaapi import NexaAPI

client = NexaAPI(api_key='your_nexaapi_key')  # Get free at nexa-api.com

# Switch between models with ONE parameter change:
for model in ['sora-2', 'veo-3', 'runway-gen4', 'kling-v3-pro']:
    response = client.video.generate(
        model=model,
        prompt='A cinematic drone shot over a misty mountain range at golden hour',
        duration=5,
        aspect_ratio='16:9'
    )
    print(f'{model}: {response.video_url}')

One SDK. One billing account. One rate limit to track.

Model Comparison 2026

Model	Provider	Resolution	Duration	Best For
Sora 2	OpenAI	Up to 4K	Up to 20s	Cinematic storytelling
Veo 3	Google	Up to 4K	Up to 8s	Realistic motion
Runway Gen-4	Runway	Up to 4K	Up to 16s	Creative/artistic
Kling v3 Pro	Kling AI	Up to 4K	Up to 10s	Asian market optimized

All available via NexaAPI — subscribe on RapidAPI.

Cost Comparison

Provider	Cost per Video	Monthly (100 videos)
Sora 2 (direct)	~$0.50–$2.00	$50–$200
Veo 3 (direct)	~$0.30–$1.50	$30–$150
Runway Gen-4 (direct)	~$0.25–$1.00	$25–$100
NexaAPI (any model)	~$0.05–$0.20	$5–$20

NexaAPI is 5–10× cheaper because they negotiate enterprise volume discounts and pass savings to developers.

JavaScript Example

// npm install nexaapi  →  https://www.npmjs.com/package/nexaapi
import NexaAPI from 'nexaapi';

const client = new NexaAPI({ apiKey: 'your_nexaapi_key' });

const response = await client.video.generate({
  model: 'kling-v3-pro',  // or 'sora-2', 'veo-3', 'runway-gen4'
  prompt: 'A futuristic city skyline at dusk with flying vehicles',
  duration: 5,
  aspectRatio: '16:9',
  quality: 'cinematic'
});

console.log('Video URL:', response.videoUrl);
console.log('Cost: ~$0.05–$0.20');

Getting Started

Get your API key: nexa-api.com (free tier available)
Or subscribe via RapidAPI: rapidapi.com/user/nexaquency
Install the SDK: pip install nexaapi or npm install nexaapi
Start generating: 50+ models, one key

Resources:

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