NTT DATA Group cuts incident analysis to 30 minutes with Codex

NTT DATA Group is a Japan based global IT services company spanning consulting, systems development, and operations. As AI reshapes the business environment, the company is evolving its growth model from expanding revenue by adding headcount to creating greater value through AI.

To support this transformation, NTT DATA Group rolled out ChatGPT Enterprise across the company and introduced programs that help employees make AI part of their daily work. Building on that foundation, the company has expanded Codex to approximately 9,000 employees. Teams across technical and nontechnical roles now use AI not only to explore ideas through conversation, but also to carry out clearly defined tasks.

Companywide ChatGPT Enterprise adoption creates the foundation for Codex

After beginning a global strategic partnership with OpenAI in May 2025, NTT DATA Group moved to deploy ChatGPT Enterprise across the company. It established an internal OpenAI Center of Excellence, or CoE, to support adoption through license distribution, technical validation, events, use case development, usage monitoring, knowledge resources, and the systems employees need to get the most from AI.

As a result, ChatGPT Enterprise has become one of the primary AI tools supporting daily work across NTT DATA Group. In an internal survey, more than 96% of respondents said they were satisfied with ChatGPT Enterprise, and more than 95% reported productivity gains.

Through everyday use, employees built experience working with AI for research, writing, and content creation. Those habits and skills prepared the organization for the next step: delegating clearly defined tasks to Codex.

An early use case builds momentum for Codex

One of the first successes to demonstrate the potential of Codex was the automation of a complex incident analysis for a critical system. The work had previously required five experienced engineers and taken three days to complete. With Codex, the full process was completed in 30 minutes.