Introducing GPT-5.4 mini and nano

OpenAI introduces GPT-5.4 mini and nano, smaller and faster versions of GPT-5.4 optimized for coding, tool use, multimodal reasoning, and high-volume API and sub-agent workloads.

From the source
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.
openai.com

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Announced: 17 Mar 2026 10:00 UTC
Detected: 03 Aug 2026 21:11 UTC (+139d after)

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