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

Shift Plus Co., Ltd. (Representative Director: Yuya Nakao, Head Office: 3070 Miyamarucho, Miyakonojo City, Miyazaki Prefecture / Main Office: 8F Edobori Center Building, 2-1-1 Edobori, Nishi-ku, Osaka City, Osaka Prefecture / hereinafter referred to as Shift Plus) is pleased to announce that its system 'Municipal AI zevo,' which enables the use of generative AI such as ChatGPT/Claude/Gemini within the local government LGWAN environment and was jointly developed with Miyakonojo City, will now offer two new models, GPT-5.4-mini and GPT-5.4-nano, to all utilizing municipalities.

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

Municipal AI zevo allows users to utilize three generative AI series: ChatGPT, Claude, and Gemini. Now, new AI models are available within the ChatGPT series.

The GPT-5.4, which will be offered on Municipal AI zevo, is the latest high-performance AI model provided by OpenAI Inc. As a reliable AI assistant, it can significantly improve developers' work efficiency and is capable of handling a wide range of tasks, from daily operations to specialized work.

About GPT-5.4-mini

GPT-5.4-mini is a lightweight and fast model provided by OpenAI.

While inheriting the capabilities of the higher-tier 'GPT-5.4' model, it operates more than twice as fast as previous generation models. It can be widely used for daily tasks such as summarizing documents, translation, and question answering.

Key features include:

- High-speed processing: Supports staff work at twice the response speed of previous generations, enabling faster operations.

 - High versatility: Suitable for various applications including document creation, summarization, translation, and Q&A.

 - Multilingual support: Accurately processes languages such as English, Chinese, and Korean, enabling translation of foreign language documents and support for inquiries from foreign residents.

Model details are as follows:

About GPT-5.4-nano

GPT-5.4-nano is the most compact model in the GPT-5.4 series.

Designed with a priority on speed and lightweight operation, it specializes in simple, repetitive tasks such as routine administrative processing and automation assistance.

For example, it can be utilized for routine municipal tasks such as data extraction and checklist processing for application forms.

Key features include:

- Fast response: Optimized for simple tasks, enabling quick responses.