GPT-5.5 vs Claude Opus 4.7 vs Gemini 3.1 Pro: The Frontier Model Showdown

This article compares the latest flagship AI models—GPT-5.5, Claude Opus 4.7, and Gemini 3.1 Pro—for production workflows, agent building, and coding tools. It argues that no single model is universally superior, with choice depending on specific tasks, price, and infrastructure, particularly for high-stakes agentic coding.