OpenAI GPT-5.4 Mini API — direct standard route — Event History

First catalog observation on 2026-11-03; not a launch announcement or a price change. Official direct standard API pricing: USD 0.75/1M input tokens, USD 4.50/1M output tokens, USD 0.075/1M cached input tokens; 400,000-token context. Regional processing +10% on eligible endpoints. No quality/deal ranking assigned.