Before adopting ChatGPT Enterprise, Zenken relied on manual processes for a wide range of knowledge tasks. Employees spent large amounts of time on research, summarization, translation, and content creation. Sales teams also faced long preparation times for client meetings, which reduced the number and quality of customer conversations.

To address these issues, Zenken decided to introduce AI in a structured and secure way. Yuji Okada, Manager of the Corporate Planning Department in the Administration Division, explains that when they evaluated potential solutions, they “focused on twelve capabilities required for our business, such as security and advanced support for complex thinking,” and recalls that “ChatGPT Enterprise was the only solution to meet all of these conditions.” He notes, "Because we deal with client and sensitive internal information, preventing data leaks is non-negotiable. ChatGPT Enterprise guarantees that our data won't be used to train its AI. This security feature gave us the confidence to safely handle confidential data."

The availability of reasoning models was also a decisive reason for choosing ChatGPT Enterprise. In Zenken’s core web marketing business, teams need to analyze clients’ business challenges in depth and propose strategic solutions. The reasoning model released by OpenAI in 2024 provides the advanced support for complex thinking that Zenken was looking for and has further accelerated the company’s use of AI. Okada explains, “The reasoning model goes beyond simply providing information and supports management level decision making in areas such as market analysis, competitive strategy, and evaluation of new business opportunities.”

Today, the reasoning model improves the quality of strategy planning and analysis across teams and is also used to examine Zenken’s own management issues and new challenges from a strategic perspective. It has become a key driver of Zenken’s business growth.