Prompt guidance for GPT-5.4 | OpenAI API

GPT-5.4, our newest mainline model, is designed to balance long-running task performance, stronger control over style and behavior, and more disciplined execution across complex workflows. Building on advances from GPT-5 through GPT-5.3-Codex, GPT-5.4 improves token efficiency, sustains multi-step workflows more reliably, and performs well on long-horizon tasks. GPT-5.4 is designed for production-

[tsukarukatamade]

とりええずあの文中改行は何言えばやめてくれんだろうなあって感じ　アメバかなんかの主婦ブログみてえなやつ

[mkusaka]

GPT-5.4向けプロンプト指南：verification_loopや3パスのresearch_mode、Responses APIのphaseやreasoning_effortを解説。

[misshiki]

“GPT-5.4向けプロンプト作成ガイド”