GPT-5.4 mini and nano
Smaller, faster GPT-5.4 versions for coding, tool use and high-volume API and sub-agent workloads.
GPT-5.4 mini and nano are smaller, faster versions of GPT-5.4 optimized for coding, tool use, multimodal reasoning, and high-volume API and sub-agent workloads.
Official source
Introducing GPT-5.4 mini and nanoopenai.com · published