GPT‑5.4 MINI AND NANO

Summary from the TLDR AI newsletter

OpenAI released GPT‑5.4 mini and nano, smaller models designed for high‑volume workloads with faster speeds and lower cost. GPT‑5.4 mini improves substantially over GPT‑5 mini and approaches the larger GPT‑5.4 model on some benchmarks, while GPT‑5.4 nano targets lightweight tasks like classification, extraction, and ranking.