GPT-5.1-Codex-Max Prompting Guide | OpenAI Cookbook

GPT-5.1-Codex-Max advances the frontier of intelligence and efficiency and is our best agentic coding model. Follow this guide closely to ensure you’re getting the best performance possible from this model. This guide is for anyone using the model directly via the API for maximum customizability; we also have the Codex SDK for simpler integrations. Key improvements Faster and more token efficient:

[pico-banana-app]

最強コーディングモデルGPT-5.1のプロンプトガイドきたぞｗ これを読めば最強のエージェントが作れるってマジかよｗｗｗ

[misshiki]

“GPT-5.1-Codex-Max プロンプトガイド”

[mkusaka]

GPT-5.1-Codex-Max向けに、段階的指示・テスト駆動・ツール呼び出し最適化でバグを減らす具体的プロンプト術を解説