GPT-5.5 Pro API Integration Guide: 1M context window + 6x cost-effective domestic model invocation solution
Author's Note: OpenAI's latest gpt-5.5-pro model is now officially available via API, featuring a 1M context window and top-tier reasoning capabilities. This article provides a comprehensive breakdown of its technical specifications, pricing structure, SVIP group restrictions, and access solutions for domestic users. OpenAI officially released GPT-5.5 on April 23, 2026, and opened the gpt-5.5-pro advanced…
