GPT-5.2-Codex Unveiled: The Agentic Coding Model Transforming Long-Running Engineering Tasks

GPT-5.2-Codex: An Agentic Coding Model for Long-Running Engineering and Defensive Security Work “ This article is based entirely on the official release information of GPT-5.2-Codex. It focuses on how the model is designed to support real-world software engineering and defensive cybersecurity workflows, rather than short, isolated coding tasks. Table of Contents Why Modern Engineering Needs Agent-Level Coding Models What GPT-5.2-Codex Is Designed to Do Key Capability Improvements Explained Long Context and Context Compaction Large-Scale Code Changes and Iterative Work Real Terminal Execution and Windows Support Multimodal Understanding for Engineering Tasks What the Benchmarks Tell Us (and What They Do Not) …