Old Computer Systems in Banks and Airlines Completely Replaced by AI? (feat. Claude)

Imagine this: you arrive at the airport early in the morning, rushing for an important overseas business trip. But suddenly, all flight schedules on the display board turn a red “Delayed.” When you ask for the reason, you’re told, “An unknown error occurred in the airline’s central computer system, grounding all flights.” Or have you ever experienced the dizzying situation of an urgent morning when you need to pay the balance for a lease, but your bank’s smartphone app crashes with a white screen, leaving you unable to transfer the funds?

Behind the massive and crucial companies that keep our society running safely—banks, airlines, insurance companies, telecommunications firms—lies a solid foundation of colossal “Legacy Systems” (outdated computer systems built decades ago that are still in use). These systems are too important to carelessly turn off or tamper with, and too old to easily add new features like modern smartphone apps. In the industry, these are called “Mission-Critical” infrastructure, meaning they are essential core systems directly tied to a company’s survival.

Recently, however, surprising news has repeatedly announced that cutting-edge artificial intelligence is being deployed into the heart of these impregnable, conservative systems. The world’s top IT infrastructure management companies are literally walking into the server rooms of banks and airlines carrying “Claude,” an AI created by Anthropic. What on earth is happening behind the scenes, out of our sight?

Why It Matters

We are already receiving help by conversing amicably with AIs like ChatGPT and Claude in our daily lives. We ask them to write emails for us or summarize long, complex documents. However, our personal use of AI on smartphones and a giant bank fully integrating AI into the core system managing trillions in customer assets are on completely different levels.

Sectors like finance, healthcare, telecommunications, aviation, and government agencies are called “Regulated Industries.” These are places that must strictly adhere to rigorous national laws and rules. They have been extremely reluctant to apply “Generative AI” (AI that creates text or images on its own) to real systems. What is the reason for this? For them, it is far more important to perfectly pass strict requirements for Accuracy, Auditability, and Oversight than simply how “smart” the AI is. TCS teams up with Anthropic on Claude for enterprises

As an analogy: if an AI accidentally misspells my personal email, it’s just an “Oops!” moment and slightly embarrassing. But what if an AI deployed in a bank causes an unexpected calculation error or makes a biased decision in the loan approval system? This leads not only to multi-million dollar lawsuits but also to chaos in the entire national economy. Furthermore, when a problem occurs, it must be possible to backtrack and meticulously audit exactly “why the AI made such a decision.” Tata Group-owned TCS partners with Anthropic to offer Claude AI access to 50,000 employees

Because of this, AI has mostly lingered on the corporate periphery, used mainly for chatbots or simple document summaries. But now, global IT companies have declared they will dive straight into the heart of enterprises—the “most important core systems”—spearheaded by the AI named Claude. This is a massive turning point, signifying that artificial intelligence technology has finally matured enough to pass the rigorous tests of the most demanding and skeptical experts.

The Explainer: A Genius Robot Plumber Deployed in an Old Pipe Network

Let’s try to understand the situation a bit more easily. Imagine a vast, aging water pipe network built 50 years ago buried underneath a metropolis. Water (data) flows constantly every day, but the pipes are severely rusted, and even the original blueprints are so old that it’s difficult to figure out what is connected to what. Completely shutting off the water to replace them with new pipes would cause a disaster that grinds the entire city to a halt.

Therefore, banks and airlines have entirely entrusted this complex and dangerous pipe management to global IT service companies (like DXC Technology, TCS, and Infosys). However, as decades of accumulated maintenance work reached the limits of human capability, these IT companies abruptly began hiring a genius robot plumber named “Claude.” Simply put, Claude takes on the role of instantly reading decades-old, complex blueprints (old computer code) and pinpointing exactly where and how to fix things without stopping the system.

Let’s look at three specific examples of what amazing things are actually happening.

1. DXC: Training Tens of Thousands of “Claude Special Forces”

DXC Technology, one of the world’s largest IT system operations companies, has formed a multi-year global partnership with Anthropic, an AI safety company. DXC and Anthropic Announce Multi-Year Global Alliance to Bring AI into Mission-Critical Enterprise Systems

They are not just simply buying and using Claude’s program (API). DXC plans to intensely train tens of thousands of Claude-certified forward-deployed engineers for massive banks, airlines, insurance companies, manufacturers, and government agencies worldwide. DXC and Anthropic Announce Multi-Year Global Alliance to Bring AI into Mission-Critical Enterprise Systems Here, “forward-deployed engineers” refers to top-tier experts, akin to special forces operatives, who are deployed directly inside clients (e.g., massive banks) to embed AI deep into their systems on the front lines. DXC will integrate Claude into the systems banks, airlines …

2. TCS: 50,000 Employees Test “AI Tasting” First

Another giant IT consulting firm, Tata Consultancy Services (TCS), has also signed a global premier partnership with Anthropic. Their goal is the same: to sell AI solutions to the most heavily regulated and demanding industries, including financial services, public services, life sciences, healthcare, aviation, and telecommunications. TCS partners with Anthropic to bring Claude AI to enterprises

But TCS’s approach is highly unique and cautious. Before blindly recommending AI for their clients’ sensitive systems, they first granted special Claude AI access privileges to 50,000 of their own employees. TCS and Anthropic Sign Global Premier Partnership — 50,000 TCS Employees to Use Claude AI A massive number of employees—enough to more than fill a large sports stadium—are deploying Claude in their daily work.

It’s like a chef at a high-end restaurant fully tasting and verifying the safety of a new dish with all kitchen staff before serving it to VIPs. By first extensively deploying Claude internally, they experience firsthand potential issues and practical operational realities. Building upon this accumulated know-how, their thorough and pragmatic strategy is to innovate their clients’ massive systems in the safest manner possible. TCS and Anthropic Partner to Scale Enterprise AI Globally

3. Infosys: Targeting the World’s Most Complex “Telecommunications Networks”

Finally, Infosys is fiercely driving AI adoption specifically tailored to the telecommunications industry we use every day. Although invisible, telecommunications networks are among the world’s most complex and strictly regulated infrastructures to operate, consisting of hundreds of millions of smartphones, giant base stations, and submarine cables entangled like a spiderweb globally. Anthropic and Infosys collaborate to build AI agents for telecommunications and other regulated industries \ Anthropic

Modernizing old and outdated legacy telecommunications infrastructure with state-of-the-art technology entails astronomical costs and terrible risks. Infosys plans to combine its proprietary technology platform (Topaz) with Claude’s outstanding reasoning abilities to make this headache-inducing migration (the process of moving data from old legacy systems to new ones) much faster and safer. This will dramatically reduce the cost of updating aging infrastructure. Furthermore, tailor-made “AI agents” for telecommunications will flawlessly perform the role of a smart, tireless assistant, swiftly modernizing complex network operations and even simplifying customer management services. Anthropic and Infosys collaborate to build AI agents for telecommunications and other regulated industries \ Anthropic

Where We Stand

We often think the AI era is still in its infancy, just taking its first steps, but the actual pace of corporate adoption far exceeds our imagination. According to the latest data released as of May 2026, Anthropic’s Claude is dominating the AI adoption scene in US enterprises with a staggering 34.4% market share. Claude AI Use Cases Across Industries: 2026 Breakdown

In the conservative banking and financial services sectors, in particular, highly noticeable, massive changes are occurring on a daily basis. Just a short time ago, artificial intelligence in this field was strongly characterized as mere tests or experiments to see, “Could we possibly use this too?” But now, moving completely beyond lab-level experiments, it is rapidly entering a true integration phase—taking root directly into the “Core Operational Integration” that serves as the backbone and foundation of banks—without any brakes. Anthropic AI Revolutionizes Banking: How Claude Models Are …

Now that massive IT service companies (DXC, TCS, Infosys) are leading the charge, firmly grasping the powerful and smart weapon called Claude to throw wide open the tightly sealed doors of regulated industries, the perceived speed of this technological innovation will undoubtedly accelerate in the blink of an eye. DXC to leverage Anthropic’s Claude for mission-critical enterprise systems - Reinsurance News

What’s Next

Let’s recall the sudden mass flight delays at the airport or the unexplained crash of the bank smartphone app blocking an urgent transfer mentioned at the beginning of this article.

The fundamental causes of the numerous major IT outages we have frequently encountered and experienced through the news mostly lied in the “massive systems themselves being too old for even developers to dare touch.” Because the amount of code accumulated over decades was unimaginably vast and complex for humans to fix manually. They were like ticking time bombs, with no one knowing where they might explode if tampered with.

But now, an AI equipped with exceptional logical reasoning abilities like Claude has been placed as a definitive tool in the hands of tens of thousands of highly trained professional engineers. These elite “forward-deployed engineers” will tame the AI within strict rules (auditability and oversight frameworks) that safely handle clients’ most sensitive data without even a speck of leakage. They will have the AI analyze and write a whopping 95% of the code on its own, systematically replacing the veins of dilapidated systems with robust new ones at a terrifying speed—10 times faster than when humans did it.

In the not-too-distant future, we will naturally enjoy faster, absolutely error-free bank transfers, flawless and pleasant flight schedule management that won’t allow even a minute of delay, and stable telecommunications networks where dropped calls or data lag are unimaginable. This is because, unbeknownst to us, artificial intelligence is newly reassembling these old skeletons supporting the world into something sturdy and precise. DXC and Anthropic Announce Multi-Year Global Alliance to Bring AI into Mission-Critical Enterprise Systems

AI’s Take

The earnest entry of AI into the deep core of the most conservative industries is massive proof that artificial intelligence technology has now completely transcended being a mere “interesting experiment.” It strongly implies that it has successfully positioned itself as “core infrastructure” capable of passing strict laws and regulations.

For a long time, many people worried that artificial intelligence would replace human creative professions (art, writing, etc.). However, the true revolution happening right now in the deepest parts of industrial sites is that AI is instead taking on the role of an exceptional “surgeon,” meticulously operating on and repairing the neural networks (old legacy code) of colossal machinery that are no longer comprehensible to human eyes.

The accuracy and stability Claude will prove in mission-critical environments where mistakes are absolutely unacceptable will serve as the most perfect textbook showing all companies in the world how to trust and adopt AI moving forward. Beyond making the world faster and flashier, artificial intelligence will now stay by our side as the quietest yet most powerful technology dependably holding the world together so it does not collapse.

References

1. DXC and Anthropic Announce Multi-Year Global Alliance to Bring AI into Mission-Critical Enterprise Systems
2. DXC and Anthropic Announce Multi-Year Global Alliance to Bring AI into Mission-Critical Enterprise Systems
3. DXC bets on Claude: 10x faster software, 95% of code by AI
4. DXC to leverage Anthropic’s Claude for mission-critical enterprise systems - Reinsurance News
5. Anthropic and Infosys collaborate to build AI agents for telecommunications and other regulated industries \ Anthropic
6. TCS and Anthropic Partner to Scale Enterprise AI Globally
7. TCS partners with Anthropic to bring Claude AI to enterprises
8. TCS teams up with Anthropic on Claude for enterprises
9. Tata Group-owned TCS partners with Anthropic to offer Claude AI access to 50,000 employees
10. TCS and Anthropic Sign Global Premier Partnership — 50,000 TCS Employees to Use Claude AI

11. [Claude Code

    Anthropic’s agentic coding system \ Anthropic](https://www.anthropic.com/product/claude-code)

12. DXC will integrate Claude into the systems banks, airlines …
13. DXC and Anthropic Announce Multi-Year Global Alliance to …

14. [Claude News

    Latest Claude News - NewsNow](https://www.newsnow.com/us/Science/AI/Claude)

15. Newsroom \ Anthropic
16. Claude AI Use Cases Across Industries: 2026 Breakdown
17. Anthropic AI Revolutionizes Banking: How Claude Models Are …