Key Takeaways
- Morgan Stanley built a proprietary AI tool (DevGen.AI) to modernize legacy code, powered by OpenAI’s GPT models.
- The tool has translated 9 million+ lines of code and saved 280,000 developer hours to date.
- DevGen.AI proves the value of custom GPT models tailored to internal business systems.
- Companies in all industries can replicate this success by training and implementing GPT models that address their unique processes.
- Welby Consulting helps organizations deploy, train, and scale custom GPT solutions that boost productivity and competitive edge.
The Problem: Legacy Code and Bottlenecked Productivity
Many enterprise companies still rely on outdated codebases — written in languages like COBOL or Fortran — which create costly, slow development cycles. The complexity of these systems makes it hard to modernize, scale, or integrate with today’s platforms.
This isn’t just a tech debt issue — it’s a growth roadblock.
The Solution: Morgan Stanley’s DevGen.AI
In January 2025, Morgan Stanley launched DevGen.AI, a proprietary tool built on GPT foundation models. DevGen.AI translates legacy code into plain-English specifications, allowing developers to rewrite or modernize old systems faster and with greater accuracy.
So far:
- 9 million+ lines of legacy code processed
- 280,000+ developer hours saved
This isn’t a generic chatbot. It’s a domain-trained GPT, custom-built to understand Morgan Stanley’s proprietary tech stack, codebase, and business logic.
Why This Matters for Every Business
Morgan Stanley’s breakthrough offers a blueprint for other enterprises: You don’t need to wait for off-the-shelf AI tools to catch up with your needs. You can build your own.
From legal teams to HR, customer service, and software engineering — businesses are sitting on huge opportunities to automate and enhance operations with custom GPT models.
These models can:
- Interpret internal documents
- Summarize workflows
- Draft emails or proposals
- Support employees in complex systems
- Train new hires
- Modernize legacy code and data
- Act as interactive, intelligent teammates
Where Do You Start?
That’s where Welby Consulting comes in.
We help companies of all sizes:
- Train and deploy Custom GPTs aligned with internal systems and language
- Run hands-on AI training for leadership and employees
- Build scalable AI architecture with privacy and data security in mind
- Integrate GPTs into tools like Slack, Microsoft Teams, internal dashboards, and CRM platforms
If Morgan Stanley can reclaim 280,000 hours with one GPT use case… imagine what’s possible in your business.
Ready to Build a Custom GPT for Your Business?
Whether you know your exact use case or just want to explore what’s possible, Welby Consulting helps you move from idea → implementation with AI systems designed for real business impact.
Contact us to schedule a discovery call.
