GPT-5.5 Breaks Ground: Complete Architectural Redesign for Autonomous Reasoning

GPT-5.5 is not an incremental update but a model trained from scratch with a fundamentally new architecture, optimized for sustained multi-step reasoning and autonomous task execution. By delivering superior intelligence while consuming fewer tokens per task, it reshapes the economics of AI development and enables genuinely agentic coding workflows. This represents a critical shift from interactive AI assistance to autonomous problem-solving, fundamentally changing how developers approach complex engineering and research work.