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OpenAI launches GPT-5.4 mini and nano with 400k context window

OpenAI has launched two new small models, GPT-5.4 mini and nano, designed for coding and multimodal tasks. The models offer a 400k context window, over 2x faster inference than their predecessor, and use only 30% of the resource requirements of earlier versions.

WHY IT MATTERS

Small, efficient models are becoming increasingly important for deployments. GPT-5.4 mini sets a new standard for cost-performance in coding tasks and is now becoming the default for many workflows, while agent infrastructure and secure code execution are becoming more central to AI applications.

SOURCES

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