日本語なし。原文: GPT-5.4 Pro API: Complete Developer Guide — Pricing, Setup & When to Use It

GPT-5.4 Pro API: Complete Developer Guide — Pricing, Setup & When to Use It TL;DR: GPT-5.4 Pro costs $30/M input and $180/M output when you go direct to OpenAI. Via ofox, Pro Plan members pay roughly $24/$144 with the 20% flagship discount. The model scores 75% on OSWorld (above the human expert b