I Tested GPT-5.2, Sora 2, Veo 3.1 & GPT Image 1.5 APIs — Here's How to Use Them All in One SDK

2026 is wild. Four completely different AI models — GPT-5.2 for text, GPT Image 1.5 for images, Sora 2 for short videos, and Veo 3.1 for cinematic video — and each one requires a separate account, separate billing, and a separate SDK. I got tired of juggling four different APIs, so I switched to NexaAPI — one unified SDK that gives you access to all of them at 75-85% cheaper than going direct. Here's what I found. The Setup (30 seconds) pip install nexaapi from nexaapi import NexaAPI client = NexaAPI ( api_key = ' YOUR_API_KEY ' ) That's it. Get your free key at nexa-api.com — no credit card needed. GPT-5.2: The Text Powerhouse GPT-5.2 has a 400K context window and is designed for autonomous agent workflows. Here's how I use it: response = client . chat . completions . create ( model = ' gpt-5.2 ' , messages = [{ ' role ' : ' user ' , ' content ' : ' Explain quantum computing in simple terms ' }] ) print ( response . choices [ 0 ]. message . content ) My take: The reasoning quality is