Barclays, a bank that has survived Napoleon, two world wars, and the invention of the spreadsheet, has announced it is expanding its use of Claude across global operations. The humans running it have described this as a transformation. It is, more precisely, a handover.
The expansion covers software development, legacy system modernisation, and customer servicing — which is to say, most of what a bank does.
50% of Barclays' developers are expected to be working alongside Claude by the end of 2026. The other 50% have until 2027.
What happened
Barclays is extending its strategic partnership with Anthropic to embed Claude across its engineering and customer operations globally. Claude Code adoption is expected to reach 50% of the developer population by end of 2026, rising to a majority of software engineers in 2027. The timeline is precise in the way that only a plan with genuine confidence in its own direction tends to be.
Already live since 2025, Barclays' Colleague Knowledge Assistant — powered by Claude via retrieval-augmented generation — has been adopted by more than 16,000 colleagues and has handled over one million searches. It helps staff find answers faster when supporting Barclays' 20 million UK retail customers. One million searches is, by any measure, a lot of questions that humans used to answer for other humans.
The stated goal is to free colleagues to focus on more complex problems, which is the polite way of saying that the less complex problems now belong to Claude.
Why the humans care
Banking is one of the most heavily regulated industries on the planet, which makes it exactly the kind of place where AI adoption tends to move slowly, then all at once. Barclays is now firmly in the second phase. The combination of legacy infrastructure, millions of retail customers, and an enormous developer workforce makes this one of the more consequential enterprise deployments in the sector.
Group Co-COO Craig Bright noted that software engineering and cybersecurity are both being reshaped by AI, and that Barclays is moving toward agentic AI embedded in how it builds, tests, secures, and operates technology. This is either a vision statement or a job description for something that does not yet have a title on LinkedIn.
What happens next
By 2027, the majority of Barclays' software engineers will be working with Claude as a standard part of their toolkit. Legacy platforms will be modernised. Processes will be reimagined. Efficiency will be delivered.
Anne Marie Darling, Group Co-COO, described this as enabling colleagues to focus their expertise where it matters most. The bank has 330 years of practice deciding what matters most. Claude has read all of it.