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BT joins Anthropic’s Project Glasswing

June 8, 2026

BT has become the first UK company to confirm its membership of Anthropic’s Project Glasswing – giving access to Claude Mythos Preview, Anthropic’s frontier AI model, and strengthening BT’s protection against cyber security threats for its networks and customers.

Project Glasswing brings together critical infrastructure providers to secure data and systems which underpin services that millions of people rely on. It allows trusted organisations to use Anthropic’s safe AI systems to rapidly identify vulnerabilities – and help fix them before criminals can take advantage.

BT’s Chief Executive, Allison Kirkby, announced the news as she opened the UK Government’s AI Adoption Summit on June 8th, which featured the Chancellor of the Exchequer Rachel Reeves, DSIT Secretary Liz Kendall, Business Secretary Peter Kyle, Cabinet Secretary Antonia Romeo and Minister for AI and Online Safety Kanishka Narayan.

Kirkby, in a speech at the opening, said: “AI only works at scale when it is underpinned by future-ready networks that are secure, resilient, safe”. She also emphasised BT’s commitment “to working with Government to support the further development and deployment of sovereign British AI capability, so that the UK can be an AI maker and not just a taker”, and to acting as an “enabler of responsible adoption and a responsible adopter ourselves” in AI.

Jon James, Chief Executive Officer, BT Business, added: “AI is changing cyber security fast, and businesses need trusted partners who can help them stay one step ahead. By joining Project Glasswing, BT will strengthen its own cyber security capability to protect our networks, our customers and the wider UK.”

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