OpenAI released GPT-5.1, enhancing speed and efficiency for coding and agentic tasks. The model adapts its reasoning based on task complexity and introduces new tools like `apply_patch` for code editing and a shell tool for command execution. Developers can leverage extended prompt caching and a "no reasoning" mode for faster responses.

This article analyzes the strengths and weaknesses of GPT-5.1 Pro and Gemini 3 as AI tools for coding and problem-solving. While GPT-5.1 Pro excels in backend tasks and detailed research, Gemini 3 is preferred for speed and frontend work. The author emphasizes the need for better integration of GPT-5.1 Pro into development environments.

This article outlines how to create a coding agent using GPT-5.1 and the Agents SDK. It demonstrates setting up the agent to scaffold a new app based on user prompts and refine it using web searches and shell commands. The guide includes code examples for establishing a workspace and executing shell commands safely.