[ChatGPT] Local Government AI zevo to Offer GPT-5.5-chat Starting May 12, 2026!
Shift Plus Co., Ltd. announced the launch of GPT-5.5-chat (gpt-chat-latest) on May 12, 2026, for all municipalities using "Jichitai AI zevo," an AI system developed jointly with Miyakonojo City that enables the use of generative AI like ChatGPT, Claude, and Gemini in the LGWAN environment.
📋 Article Processing Timeline
- 📰 Published: May 13, 2026 at 04:00
- 🔍 Collected: May 12, 2026 at 19:32
- 🤖 AI Analyzed: May 12, 2026 at 19:59 (27 min after Collected)
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 referred to as Shift Plus) announced that it has started offering the new GPT-5.5-chat (※gpt-chat-latest) to all municipalities using "Jichitai AI zevo," a system jointly developed with Miyakonojo City that enables the use of generative AI such as ChatGPT, Claude, and Gemini in the LGWAN environment for local governments.
■ Newly added GPT-5.5-chat (※gpt-chat-latest)! The number of available AI models has further increased!
GPT-5.5-chat (※gpt-chat-latest) added
Jichitai AI zevo allows you to use three generative AI series: ChatGPT, Claude, and Gemini. This time, a new AI model has become available in the ChatGPT series.
The GPT-5.5-chat, which will be offered by Jichitai AI zevo, is the latest chat-optimized model provided by OpenAI. Compared to conventional models, it has achieved significant improvements in factual accuracy, tool calling, and response efficiency, and is expected to be reliably utilized in business operations.
Key features are as follows:
Significant improvement in factual accuracy
Misinformation generation (hallucinations) and incorrect claims in conversations with many factual errors have been reduced compared to conventional models, making it suitable for use in tasks requiring accuracy, such as referring to ordinances and regulations, legal confirmation, and policy planning support.
Concise and high-quality responses
While maintaining response quality, the number of words in responses has been reduced by approximately 25-30%. Unnecessary confirmation questions and excessive embellishments are suppressed, providing output that can be directly utilized in resident correspondence and document creation.
Improved accuracy in utilizing long and complex contexts
System prompts, conversation history, reference documents, and structured data can now be utilized more accurately. This is expected to provide more consistent output for inquiries combining multiple information sources and tasks requiring continuous conversation. Model details are as follows:
Model details are as follows:
GPT-5.5-chat (※gpt-chat-latest)
Knowledge cutoff: August 2025
Context window Input: 128000 Output: 16000
Region: EU
Customers using Jichitai AI zevo can use the additional model without additional cost.
We will continue to expand our functions to support an even wider variety of generative AI models. We hope you will continue to utilize Jichitai AI zevo.
*By default, it is set to "Usage Prohibited," and usage requires permission settings by the organization administrator.
*The official name on Azure is "gpt-chat-latest," but for clarity, it is referred to as GPT-5.5-chat.
■ Jichitai AI zevo connects, expands, and becomes even more convenient
Provides business chat tool LGTalk
When you subscribe to "Jichitai AI zevo," you can be provided with LGTalk business chat tool accounts for the number of your staff as an ancillary service. LGTalk is a chat tool that emphasizes security, such as file sanitization. You can directly use generative AI (Jichitai AI zevo) from the chat.
A trial for up to 10 accounts is also available.
Can be linked with eRex
It can be linked with "eRex," an LGWAN-exclusive voice recognition AI transcription tool. A one-month free trial for "eRex" is also being conducted.
Please feel free to contact us if you are interested.
We look forward to your continued support of Shift Plus and "Jichitai AI zevo."
■ About Shift Plus Co., Ltd.
Shift Plus Co., Ltd. was established in December 2006 in Nishi-ku, Osaka City, and has its headquarters in Nishi-ku, Osaka City, and its head office in Miyakonojo City, Miyazaki Prefecture, with 27 sales offices throughout Japan. Its main business activities include the development and maintenance of systems for local governments, consulting, outsourced business services, and proposals, design, construction, and maintenance of web systems. It independently develops the Furusato Nozei management system "LedgHOME" and undertakes all Furusato Nozei operations, with over 520 municipalities from Hokkaido to Kyushu having adopted the system (as of the end of August 2025), and the system manages approximately 50% of the total donations nationwide.
■ Newly added GPT-5.5-chat (※gpt-chat-latest)! The number of available AI models has further increased!
GPT-5.5-chat (※gpt-chat-latest) added
Jichitai AI zevo allows you to use three generative AI series: ChatGPT, Claude, and Gemini. This time, a new AI model has become available in the ChatGPT series.
The GPT-5.5-chat, which will be offered by Jichitai AI zevo, is the latest chat-optimized model provided by OpenAI. Compared to conventional models, it has achieved significant improvements in factual accuracy, tool calling, and response efficiency, and is expected to be reliably utilized in business operations.
Key features are as follows:
Significant improvement in factual accuracy
Misinformation generation (hallucinations) and incorrect claims in conversations with many factual errors have been reduced compared to conventional models, making it suitable for use in tasks requiring accuracy, such as referring to ordinances and regulations, legal confirmation, and policy planning support.
Concise and high-quality responses
While maintaining response quality, the number of words in responses has been reduced by approximately 25-30%. Unnecessary confirmation questions and excessive embellishments are suppressed, providing output that can be directly utilized in resident correspondence and document creation.
Improved accuracy in utilizing long and complex contexts
System prompts, conversation history, reference documents, and structured data can now be utilized more accurately. This is expected to provide more consistent output for inquiries combining multiple information sources and tasks requiring continuous conversation. Model details are as follows:
Model details are as follows:
GPT-5.5-chat (※gpt-chat-latest)
Knowledge cutoff: August 2025
Context window Input: 128000 Output: 16000
Region: EU
Customers using Jichitai AI zevo can use the additional model without additional cost.
We will continue to expand our functions to support an even wider variety of generative AI models. We hope you will continue to utilize Jichitai AI zevo.
*By default, it is set to "Usage Prohibited," and usage requires permission settings by the organization administrator.
*The official name on Azure is "gpt-chat-latest," but for clarity, it is referred to as GPT-5.5-chat.
■ Jichitai AI zevo connects, expands, and becomes even more convenient
Provides business chat tool LGTalk
When you subscribe to "Jichitai AI zevo," you can be provided with LGTalk business chat tool accounts for the number of your staff as an ancillary service. LGTalk is a chat tool that emphasizes security, such as file sanitization. You can directly use generative AI (Jichitai AI zevo) from the chat.
A trial for up to 10 accounts is also available.
Can be linked with eRex
It can be linked with "eRex," an LGWAN-exclusive voice recognition AI transcription tool. A one-month free trial for "eRex" is also being conducted.
Please feel free to contact us if you are interested.
We look forward to your continued support of Shift Plus and "Jichitai AI zevo."
■ About Shift Plus Co., Ltd.
Shift Plus Co., Ltd. was established in December 2006 in Nishi-ku, Osaka City, and has its headquarters in Nishi-ku, Osaka City, and its head office in Miyakonojo City, Miyazaki Prefecture, with 27 sales offices throughout Japan. Its main business activities include the development and maintenance of systems for local governments, consulting, outsourced business services, and proposals, design, construction, and maintenance of web systems. It independently develops the Furusato Nozei management system "LedgHOME" and undertakes all Furusato Nozei operations, with over 520 municipalities from Hokkaido to Kyushu having adopted the system (as of the end of August 2025), and the system manages approximately 50% of the total donations nationwide.