OpenAI Introduces GPT‑5.4 mini and nano openai.com

OpenAI is releasing GPT‑5.4 mini and nano, our most capable small models yet. They bring many of the strengths of GPT‑5.4 to faster, more efficient models designed for high-volume workloads.

GPT‑5.4 nano is the smallest, cheapest version of GPT‑5.4 for tasks where speed and cost matter most. It is also a significant upgrade over GPT‑5 nano.

GPT‑5.4 mini is available today in the API, Codex, and ChatGPT.