How I Compared 10 AI Video Generation APIs in One Weekend (and Found the Cheapest)

Last weekend I set out to benchmark every major AI video generation API. Sora, Runway Gen-4, Kling, Pika, Luma Dream Machine, Veo 3, Wan 2.1 — all of them. The problem: each one has a different SDK, different authentication, different billing, different rate limits. The solution I found: NexaAPI — a unified endpoint that routes to all of them with one API key. Here's what I found. The Setup # pip install nexaapi → https://pypi.org/project/nexaapi/ from nexaapi import NexaAPI client = NexaAPI ( api_key = ' your_key ' ) # Get free at nexa-api.com MODELS_TO_TEST = [ ' sora-2 ' , ' veo-3 ' , ' runway-gen4 ' , ' kling-v3-pro ' , ' wan-2.1 ' , ] PROMPT = " A serene Japanese garden with cherry blossoms falling, cinematic 4K " for model in MODELS_TO_TEST : response = client . video . generate ( model = model , prompt = PROMPT , duration = 5 , aspect_ratio = ' 16:9 ' ) print ( f ' { model } : { response . video_url } ' ) One SDK. All models. This is what I wish existed when I started. The Resul