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Large Language ModelsAI Business & IndustryOpenAI BlogPublished: May 29, 2026, 16:00 JST

MUFG rolls ChatGPT Enterprise out to 35,000 staff

3 Key Points

  1. What happened

    Mitsubishi UFJ Bank began a phased rollout of ChatGPT Enterprise in 2026, targeting approximately 35,000 employees. OpenAI provided training materials, banking-specific examples, and custom GPT workshops as part of the launch.

  2. Why it matters

    The rollout is central to MUFG's goal of becoming an AI-native company, which its CDTO says will fundamentally change finance. The bank sees employee AI adoption as key to building better financial services and customer experiences.

  3. What to watch

    Whether the internal shift sticks: employees created over 1,800 custom GPTs in four months after training, and leaders say the conversation moved from 'can we use it?' to 'how should we use it?' Success hinges on whether these AI bankers and new customer services, like the AI concierge at the digital bank, drive real value.

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Context & Analysis

MUFG's partnership with OpenAI began in October 2024 to modernize operations with generative AI. By 2026, the bank moved to a phased rollout of ChatGPT Enterprise, signaling a shift from experimentation to organization-wide integration. The stated goal is not mere efficiency but a deeper transformation where AI is part of everyday work, with training made mandatory to establish shared standards.

The rollout addresses a recognized internal barrier: employees' uncertainty about use and rules, which the bank identified as a blocker separate from technology. AI champions were appointed in each department to drive adoption from within. The creation of over 1,800 custom GPTs in four months, known as 'AI bankers', suggests early traction in embedding AI into daily workflows.

The stakes for MUFG extend beyond internal adoption. The company is exploring AI-native customer experiences through Moneytree, WealthNavi, and its digital bank. While early results show promise (training participation reached 100%, and employees reported a 20-30% workload reduction in select tasks), the ultimate test will be whether these tools translate into better customer relationships and new financial services, allowing employees to reinvest time saved into higher-value human work. The outcome hinges on moving from initial adoption to sustained, value-creating use across a large and regulated organization.

FAQ
When did MUFG start rolling out ChatGPT Enterprise?
Beginning in 2026, Mitsubishi UFJ Bank started a phased rollout of ChatGPT Enterprise.
What are 'AI bankers' at MUFG?
AI bankers are custom GPTs created by employees in each department. They tailor them to their workflows, using them for tasks like streamlining work and making specialized knowledge more accessible.
How is MUFG using AI for customer-facing services?
Through Moneytree, users will ask questions in natural language within ChatGPT. At WealthNavi and the digital bank, MUFG plans to use an AI concierge and MAP for personalized recommendations.

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