OpenAI launches GPT-5.4 mini and nano, aimed at agents, coding, and multi-modal workflows, and offering near GPT-5.4-level performance at a much lower cost (David Gewirtz/ZDNET)

OpenAI has released GPT-5.4 mini and nano, models designed for agents, coding, and multi-modal workflows. They deliver performance close to GPT-5.4 while operating at a significantly lower cost.

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