OpenAI Blog · Mar 17, 2026
Introducing GPT-5.4 mini and nano
Reviewed by Errol Vogt, Site support technician & online learning analyst · original summary · editorial policy
Introducing GPT-5.4 mini and nano. 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. This update is relevant for small-office operators tracking changes in their tools.
Operator takeaway: For operators: review whether 'Introducing GPT-5.4 mini and nano' affects your current setup before relying on it in production.