Project Glasswing is Anthropic's initiative designed specifically for operators of essential services and critical national infrastructure. The programme provides trusted organisations with exclusive access to Anthropic's AI systems to uncover security weaknesses and accelerate remediation efforts — before threat actors can exploit them.

BT Group joins a select group of organisations that gained access when the initiative was announced in April 2026, which included technology giants Palo Alto Networks and Broadcom. BT's entry marks the programme's first expansion to a UK telecoms operator, reflecting the critical importance of securing national communications infrastructure against increasingly sophisticated AI-powered threats.

BT CEO Allison Kirkby announced the Project Glasswing partnership during the UK Government's inaugural AI Adoption Summit, where political and technology leaders convened to explore how AI can support economic growth and public services. Kirkby opened the summit with a keynote address linking AI ambition directly to network security and resilience.

She reaffirmed BT's commitment to working with the Government to develop sovereign British AI capability, positioning the company both as an enabler of responsible AI adoption and as a responsible adopter in its own right. The summit appearance underscored BT's role at the intersection of national digital infrastructure and AI policy.

The scale of the threat facing BT is stark: four million cyberattacks blocked daily illustrates both the intensity of malicious activity targeting digital infrastructure and the imperative for automated, AI-driven defences. Cyber criminals are increasingly deploying AI tools of their own, putting infrastructure providers under mounting pressure to modernise security operations and cut detection and response times dramatically.

BT's participation in Project Glasswing builds on existing AI cybersecurity investments, including AI-powered security products aimed at organisations of all sizes — including small businesses — and a strategic collaboration with Accenture focused on developing AI-driven cyber operations capable of responding to threats at machine speed. Claude Mythos Preview is expected to enhance and accelerate all of these capabilities.

Key Takeaways

• →BT Group becomes the first UK company to join Anthropic's Project Glasswing, gaining access to Claude Mythos Preview — Anthropic's most advanced frontier AI model — for cybersecurity applications.
• →BT already blocks around four million cyberattacks daily, highlighting the immense scale of threat facing critical national infrastructure operators and the urgent need for AI-augmented defences.
• →Project Glasswing is purpose-built to help essential service operators find and fix vulnerabilities faster than attackers can exploit them — using AI as a proactive rather than reactive security tool.
• →CEO Allison Kirkby announced the partnership at the UK Government's first AI Adoption Summit, framing secure, resilient networks as the essential foundation for AI working at national scale.
• →BT's collaboration with Accenture on machine-speed cyber operations, combined with the Glasswing partnership, signals a comprehensive AI-first security strategy across the group.
• →The move reinforces the UK's ambition to be an AI maker, not just a taker — using frontier AI in live critical infrastructure to build genuine sovereign cybersecurity capability.