[GPT-5.4-mini/nano] Available on Local Government AI zevo from March 27, 2026!

Shift Plus Co., Ltd. (Representative Director: Yuya Nakao, Head Office: 3070-1 Miyamaru-cho, Miyakonojo City, Miyazaki Prefecture / Headquarters: Edobori Center Building 8F, 2-1-1 Edobori, Nishi-ku, Osaka City, Osaka Prefecture / hereinafter "Shift Plus") announces that it has begun offering two new models, GPT-5.4-mini and GPT-5.4-nano, to all local governments using "Local Government AI zevo," a system jointly developed with Miyakonojo City that allows generative AI such as ChatGPT, Claude, and Gemini to be utilized in the LGWAN environment for local governments.

■Two New Models, GPT-5.4-mini and GPT-5.4-nano, Added! The Number of Available AI Models Has Further Increased!

Local Government AI zevo currently offers three generative AI series: ChatGPT, Claude, and Gemini. This time, new AI models have become available within the ChatGPT series.

GPT-5.4, which will be available on Local Government AI zevo, is the latest high-performance AI model provided by OpenAI, Inc. As a reliable AI assistant, it is a model that can not only significantly improve developers' work efficiency but also handle a wide range of tasks, from daily routines to specialized operations.

We will now provide information on GPT-5.4-mini and GPT-5.4-nano.

・About GPT-5.4-mini

GPT-5.4-mini is a lightweight and high-speed model provided by OpenAI. While inheriting the capabilities of the higher-end model "GPT-5.4," it operates more than twice as fast as previous generation models. It can be widely used in daily tasks such as document summarization, translation, and question answering.

Key features are as follows:

- High-speed processing: Supports staff operations quickly with a response speed more than twice that of the previous generation.

 - High versatility: Supports various uses such as document creation, summarization, translation, and Q&A.

 - Multilingual support: Can process English, Chinese, Korean, and other languages with high accuracy, and can be used for translating foreign language documents and responding to inquiries from foreign residents.

Model details are as follows:

・About GPT-5.4-nano

GPT-5.4-nano is the most compactly designed model in the GPT-5.4 series. It is designed with the highest priority on speed and lightness, specializing in simple, repetitive tasks such as routine administrative processing and automation assistance. For example, it can be used for routine local government tasks such as data extraction and checklist processing for application documents.

Key features are as follows:

- High-speed response: Specialized in simple tasks, enabling quick responses.

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