The project launched in April and allows trusted organisations to use Anthropic’s AI systems to identify vulnerabilities and fix them before criminals take advantage
BT has become the first UK company to confirm its membership of Anthropic’s Project Glasswing. It will have access to Claude Mythos Preview, Anthropic’s frontier AI model. BT claims this strengthens its protection against cyber security threats for its networks and customers.
Anthropic’s Claude Mythos can autonomously sequence multi-stage attacks and identify dormant bugs in decades-old codebases. It finds vulnerabilities then compiles and runs code to test and prove exploitability. Consequently, access to it is tightly restricted.
Anthropic launched Project Glasswing in April with about 50 founding partners and extended testers, including Amazon Web Services, Microsoft, Apple, Google, Nvidia, CrowdStrike and Palo Alto Networks. Its purpose is to bring together 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 identify vulnerabilities quickly – and help fix them before criminals can take advantage.
Telco joins the fray
Verizon was the first telco to join the project in May, followed by SK Telekom and AT&T. Earlier this month, Anthropic announced it is expanding the initiative, giving access to another 150 organisations across 15 countries, including from healthcare, water and power utilities, communications and hardware vendors. The current total of participants is about 200.
Each new organisation must pass rigorous security tests before gaining access to the unreleased Claude Mythos model to scan software for vulnerabilities.
BT’s Chief Executive, Allison Kirkby, announced the news as she opened the UK Government’s AI Adoption Summit yesterday. She 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 said: “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.”
BT Business provides AI-powered cybersecurity solutions to customers of all sizes, including new products for small businesses – and it recently announced a collaboration with Accenture to develop advanced AI-powered cyber operations, responding to cyber threats at machine speed.


