FIS adds Anthropic’s Mythos 5 to infrastructure security program

FIS said it is using Anthropic’s Mythos 5 model through Project Glasswing, a controlled-access initiative aimed at applying frontier artificial intelligence to the security of software used in critical infrastructure. The move adds an AI-based defensive layer to the security program of a financial technology group whose systems clear payments, move money and support core banking for thousands of institutions worldwide.

The company, listed on the New York Stock Exchange under the ticker FIS, described the work as part of an extension of its partnership with Anthropic. FIS said Project Glasswing gives selected participants access to Anthropic’s most advanced AI models for defensive security tasks, with a focus on organizations that build or maintain foundational software.

FIS said protecting its code is central to the stability of financial infrastructure because its technology sits behind payment clearing, money movement and bank operations across global markets. The company said it applies the same security standard to its internal infrastructure that it expects from the technology it provides to clients.

Project Glasswing is structured as a controlled-access program rather than a broad commercial product, according to FIS. In practice, that means participants use Anthropic’s frontier AI capabilities within a defined security setting, with the model acting as an additional tool for defensive work rather than replacing existing controls or governance processes.

FIS said its participation is separate from its commercial deployment of Anthropic AI agents. The company linked both efforts to a disciplined approach to using advanced AI in financial systems, where it said security, reliability and trust are essential requirements.

The initiative also sits alongside wider industry engagement by FIS. The company said its security posture is shaped by active involvement with the Financial Services Information Sharing and Analysis Center and the Financial Services Sector Coordinating Council, as well as continuing regulatory collaboration and industry intelligence-sharing.

Those organizations are part of the financial sector’s broader cyber and operational resilience framework. FS-ISAC is used by financial institutions and service providers to share threat intelligence, while the Financial Services Sector Coordinating Council works with public-sector counterparts on security and resilience matters, according to FIS’s description of its engagement.

Anthropic’s role in the arrangement centers on Project Glasswing and the use of Mythos 5 for defensive security work. FIS did not describe the initiative as a customer-facing banking product, and the company’s description placed the emphasis on securing the software infrastructure that supports financial services operations.

The announcement did not provide financial terms, deployment timelines or technical details about specific security tasks assigned to Mythos 5. FIS framed the collaboration as part of its broader effort to strengthen internal systems and support the security community serving the financial services sector.

This story draws on original reporting from Finextra Research.